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Expressing solution concentration. You are going to assume that the density of vinegar is 1 g/mL. 2018/2019 10 mL volumetric pipette, suction bulb, retort rod, burette, burette clamp, 150 mL beaker, 2 125 mL Erlenmeyer flasks, vinegar, standard sodium hydroxide (made in Part A of this investigation, phenolphthalein. Distilled vinegar contains 5-8% acetic acid. Table 4 shows the calculations derived from experiment 10, vinegar analysis. Assuming its mass percent (wt%), you first have to calculate the actual concentration of the solution like this: 5% Acetic acid means in a $\pu{1 kg}$ solution, you can find $0.05 \times \pu{1000 g} = \pu{50 g}$ acetic acid. Part B Titration of vinegar with standard sodium hydroxide (B1) Dilute one of the vinegars a factor of ten by pipetting 25.00 mL of it into a by 250.0 mL volumetric flask and making it … Subscribe to RSS headline updates from: Powered by FeedBurner, Table vinegar typically contains between 4 and 8, Acetic acid (ethanoic acid) will react with a strong base in, It is therefore possible to determine the concentration of acetic acid in vinegar by. Table vinegar, however, is commonly used in the kitchen just to give food some flavour. If you have access to a still you can distil the vinegar solution, however this can only go so far. Spirit of vinegar is a stronger form of vinegar that contains 5-20% acetic acid. Please enable javascript and pop-ups to view all page content. potassium. Apparatus Apparatus used in this experiment including descriptions are listed in Table 5.1. The burette was filled with the standardized NaOH solution and the initial reading recorded to the nearest 0.01 ml. Table vinegar typically contains between 4 and 8 % v/v acetic acid (ethanoic acid). Obtain a 10 ml volumetric pipette and suction bulb. Subsequently, question is, what is the concentration of 5% vinegar? Titration is a quantitative, volumetric technique where a solution with a known concentration is added to a solution of an unknown concentration until the equivalence point is reached. Determining the Concentration of Acetic Acid in Vinegar by Direct Titration Key Concepts. 40% Vinegar is a highly concentrated white vinegar product that has hundreds of practical uses! 05 g/mol= . But you can also reduce finished vinegars to the desired acidity. Who says you can destroy wood and brick but you can't destroy a movement? When a weak acid such as acetic acid is titrated with a strong base such as aqueous sodium hydroxide solution, the pH at the equivalence point will be greater than 7. During a titration, the solution with the unknown concentration is … I titrated approximately 7.5ml of NaOH (0.5mol/L) into this solution. Procedure. Check your concentration with your demonstrator before proceeding to Part B. Concentration Of CH,COOH In Vinegar % CH3COOH In Vinegar Average Volume Of NaOH Used (mL) 3 Ml Concentration CH3COOH In Vinegar (mol/L) 0.03 Mol/l. Repeat the calculations for each type of vinegar you tested. (adsbygoogle = window.adsbygoogle || []).push({}); Want chemistry games, drills, tests and more? 848 x 10 -4moles of acetic acid x 60. What is the molar concentration of acetic acid in a sample of vinegar? Concentration of CH,COOH in Vinegar % CH3COOH in vinegar Average volume of NaOH used (mL) 3 ml Concentration CH3COOH in vinegar (mol/L) 0.03 mol/l . Apparatus Apparatus used in this experiment including descriptions are listed in Table 5.1. But a quick bit of research showed me that those concentrations are all lethal if consumed straight. Hereof, what is the concentration of white vinegar? As an example, let’s say you measure out 25.00 mL of vinegar using a buret. The purpose of this experiment is to determine the acetic acid content of a commercial vinegar by volumetric analysis. NaOH was added in small amounts at a time to a beaker containing 5.00 mL of vinegar and 20.0 mL of deionized water. Critical thinking questions To work out the concentration of different table vinegars, a food chemist reacts a solution of brand A with 25 mL of a 0.100 M NaOH solution. While analyzing vinegar and the percent composition of acetic acid in it, an acid/base reaction was performed by adding NaOH, a base, to vinegar, the acid. The purpose of this experiment was to determine the concentration of acetic acid in vinegar using titration method. Which factor contributed the most to urbanization in the late 1800s? I also discovered that you can buy 60%, 80% and even 97% vinegar concentrate . Vinegar consists of acetic acid (CH 3 COOH), water and trace amounts of other chemicals, which may include flavorings. Vinegar is produced by the oxidation of ethanol. STEP 4: Use the ICE table to calculate concentrations with \(K_a\) The expression for K a is written by dividing the concentrations of the products by the concentrations of the reactants. I started out with 5ml of Vinegar, and added 45ml of water to make a solution of 50ml. Anthocyanin concentration decreased following ethanol and acetic fermentation (Table 5), but no significant difference was observed in the hydroxyl radical-scavenging capacity of vinegar and wine. Course. What is the strongest white vinegar you can buy? M Solution) Mass of Acetic Acid in Vinegar (g): Moles of Acetic Acid (mol) x Molar Mass of Acetic Acid (g/mol): 026 x 10 -4moles of acetic acid x 60. Acetic Acid is a synthetic carboxylic acid with antibacterial and antifungal properties. To do this, multiply the molar concentration of acetic acid by the molecular mass of acetic acid, which is 60. The pH value of vinegar is 2.6. Expert Answer 100% (1 rating) Previous question Next question Transcribed Image Text … You can also calculate the concentration in terms of grams of acetic acid per liter. This procedure improves the accuracy of the NaOH concentration from 0.10M to a value with 4 significant figures. Repeat the titration carefully several times until. Food Uses. Avg. Fill with water to 2 gallons in a hand sprayer (this makes 10% concentration for immature or non-established weeds) Fill with water to 1 gallon in a hand sprayer (this makes 20% concentration for mature and established weeds) Add 1 cup of salt (do not use epsom salt) (recommend table salt) Course. Run NaOH(aq) from the burette (buret) into the conical (erlenmeyer) flask until the solution changes colour from colourless to pink. 2 Activity 2 Data Table 2 Name of Vinegar Sample Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Mass of Vinegar 5.02 g 4.92 g 4.95 g Volume of Vinegar 4.99 mL 4.90 mL 4.93 mL Initial NaOH Volume in Syringe 10.1 mL 10.0 mL 10.0 mL Final NaOH Volume in Syringe 6.2 mL 6.1 mL 6.1 mL Volume NaOH Delivered 3.9 mL 3.9 mL 3.9 mL Moles of NaOH Delivered These observations indicate the presence of new compounds with higher antioxidant activity in the purple sweet potato wine and vinegar. . Table vinegar typically contains between 4 and 8 % v/v acetic acid (ethanoic acid). Extract the relevant data from the experiment, Calculate volume of acetic acid using its mass and known, Calculate concentration of acetic acid in vinegar as v/v %. Show transcribed image text. It contains the highest concentration of Acetobacters . Mix one quart of 75% vinegar. When pickling food, they end up very sour and have a vigorous flavour meaning the vinegar must have been pretty acidic. Formal Lab Report of Vinegar Lab. Set up the equipment as in the diagram on the right. Objective: Determine the concentration of acetic acid in a vinegar sample. True False 2. Brückner et al [14] also investigated vinegar made from Sherry wine (Old Sherry wine vinegar, from Jerez de la Frontera).Relative amounts of 25.4 % D-Asp, 13.4 % D-GIu, 4.7 % D-Ser, 24.4 % D-Ala and 9.4 % D-Leu were found.. Distilled vinegar contains 5-8% acetic acid. ... 25% acetic acid vinegar is a very strong concentration! Table vinegar typically contains between 4 and 8 % v/v acetic acid (ethanoic acid). In your everyday life, you encounter solutions all the time. All balsamic vinegars had significant amounts of D-Leu, D-Phe, D-Tyr D-Orn, and DLys and most of them also contained D-Val and D-Ser. Why? Pickling vinegar has a greater concentration of acetic acid because commercial food pickling needs more concentrated solutions. The producer of vinegar also prefers a product with high acetic acid content because of the savings in freight and in storage capacity. The equation for the titration reaction is: CH 3COOH + NaOH CH 3COONa + H 2O This is a weak acid/strong base titration, and so phenolphthalein indicator is used. The salt dissolves in the water, resulting in a solution. Each blog post includes links to relevant AUS-e-TUTE tutorials and problems to solve. How would your experimentally determined vinegar concentration have differed if from CHEM 1411 at Trinity Valley Community College volume of acetic acid = mass acetic acid ÷ density acetic acid Are Indus Valley and Harappan Civilization same? 0171 g 3. When used for pickling, the acetic acid content can be as high as 12 %. White cleaning vinegar has a higher percent of acetic acid (usually 6-8%) and a pH of around 2. Add a few drops of phenolphthalein to the base solution. This will protect your floor from too strong a concentration of acidic vinegar, and will help lift off any grease or dirt. Using the initial concentration of CH3COOH (from Problem 2) and the equilibrium concentration of H3O+ calculated (from Problem 3), complete the reaction table for vinegar. 0182 g 2. See the answer. Rinse a clean 25.00 mL pipette (pipet) with vinegar. University. Also, what is the concentration of acetic acid in g per 100 mL of vinegar? For complete kill and non-reemergence use the following formula: Mix one quart of 75% vinegar. It contains 5 – 8% of the acetic acid. How do you increase the strength of vinegar? Fermentation: Obtained by fermentation of the alcohol. Balsamic vinegars (aceto balsamico tradizionale di Modena) contained highest amounts of D-amino acids (46-361 mg/l). There is one formal lab report required for the Chem-C125 lab and it is this one. Background. Vinegar is essentially a solution of acetic acid (\(\ce{HC2H3O2}\)) in water. No ads = no money for us = no free stuff for you! PH value: The pH value of vinegar is 2.4. In this follow-up to the titration demonstration, we use the results to calculate the concentration of ethanoic in vinegar. Rinse the burette with water, then a little vinegar. The concentration of the solution tells you how much solute has been dissolved in the solvent. 848 x 10 -4moles of acetic acid x 60. Vinegar is produced by the oxidation of ethanol. Indiana University - Purdue University Indianapolis. 5. Pickling vinegar has a greater concentration of acetic acid because commercial food pickling needs more concentrated solutions. Flavorings may include sweeteners, such as sugar or fruit juices. White table vinegar usually contains 5% acetic acid and has a pH of approximately 3. Explore more on it. If the concentration of one of the solutions is known, the concentrations of the others can be determined from the volumes used. Independent Type of vinegar used By using vinegar of different brands for the experiment. If vinegar bacteria are grown at home, it may be necessary to dilute the vinegar. To do this, a pH electrode has been placed into an one hundred mL beaker along with 5. This problem has been solved! Do they sell elf on the shelf at Walmart? Write the balanced chemical equation for the neutralisation reaction: Extract all the relevant data from the experiment. The concentration of the acetic acid is variable. Vinegar is an aqueous solution of acetic acid and trace chemicals that may include flavorings.Vinegar typically contains 5–8% acetic acid by volume. The Determination of Acid Content in Vinegar Reading assignment: Chang, Chemistry 10th edition, pages 153-156. Use 40% Vinegar to clean and deodorize your home or use it in your garden for a number of tasks. It produces malt vinegar by allowing beer to ferment a second time. Most of your "household" chemicals are solutions. Experiment 3 DETERMINATION OF ACETIC ACID CONTENT IN VINEGAR Wine labs test for tartaric and acetic acid in “titratable acidity (TA)” testing which is basically NaOH titration. The difference between White and Distilled Vinegar is that white vinegar is a common type of vinegar with 93–96% water and 4–7% acetic acid concentration and used for food preparation & cleaning in every household, while the distilled vinegar is a distilled variety of vinegar with 80-95% water and 5-20% acetic acid concentration and used for herbal medicine & industrial food production. Which do you think has the greatest concentration of acetic acid: table vinegar or pickling vinegar? Greasy Stovetop. vinegar, including cultivar, ripeness and choice of microorganisms for fermentation. What do you wear to a casual wedding rehearsal? Introduction Vinegar is a common household item containing acetic acid as well as some other chemicals. Who won the men's singles Miami Open in 2019? The amounts of D-Pro and D-Ala significantly increased in the course of maturation (Table 6). The Concentration of Acetic Acid: It contains 5 – 20% of the acetic acid. Obtained by fermentation of the distilled alcohol or neutral spirit. It uses grain alcohol in production of distilled white vinegar, while apple cider or wine is common in other types of vinegar. Using the known density of acetic acid it is possible to calculate the concentration of acetic acid in vinegar as a v/v%: Please do not block ads on this website. Rinse a clean 50.00 mL burette (buret) with. If you have access to a still you can distil the vinegar solution, however this can only go so far. It skimmed off the top and added to subsequent barrels of alcohol to spread the formation of vinegar. Critical thinking questions To work out the concentration of different table vinegars, a food chemist reacts a solution of brand A with 25 mL of a 0.100 M NaOH solution. Determining the Concentration of Acetic Acid in Vinegar by Direct Titration Key Concepts. They are mainly plant materials with some exceptions, such as whey and honey, and encompass a wide variety of origins. Calculations: Molar Concentration of NaOH (mol/L) Given (. Vinegar companies get fined for missing acidity guidelines, not pH ones. The concept associated with titration in this lab was to determine the particular concentration of acetic acid inside vinegar by adding base to the solution until the mixture was simple. The concentration of the acetic acid is variable. 05 g/mol= . To standardize the NaOH solution, you’ll perform a titraition where it reacts with a solution containing the organic acid . 3. 05 g/mol= . Use these values and K a (the equilibrium constant for acids) to find the concentration x. When pickling food, they end up very sour and have a vigorous flavour meaning the vinegar must have been pretty acidic. The concentration of acetic acid in vinegar may be expressed as a molarity (in mol/L): What properties do a stream's competence and capacity refer to? The most common raw materials used to obtain vinegar are shown in Table 25.1. The mother of vinegar is a gooey film that appears on the surface of the alcohol products as it is converted to vinegar. formal laboratory report c125 experimental chemistry section 20500 iupui november 09, 2018 finding unknown concentration using titration introduction most. 0182 g 2. concentration of NaOH(aq) = c(NaOH) = 1.00 mol L-1, moles NaOH(aq) = n(NaOH) = c(NaOH) × V(NaOH) Sign in Register; Hide. Use the balanced chemical equation to determine the, Use the stoichiometric (mole) ratio to calculate the moles of acetic acid, From the volume of vinegar (acetic acid solution) and the moles of acetic acid, calculate its concentration (c) in mol L. Write an expression for calculating v/v % concentration. What is the weight percentage of ch3cooh in vinegar. Question: Convert the % concentration of acetic acid in a vinegar solution to a g/100 mL concentration given that the concentration in g/100 mL for 100% acetic acid is 4.2 g/100 mL. ICE tables are composed of the concentrations of molecules in solution in different stages of a reaction, and are usually used to calculate the K, or equilibrium constant expression, of a reaction (in some instances, K may be given, and one or more of the concentrations in the table will be the unknown to be solved for). If the concentration of one of the solutions is known, the concentrations of the others can be determined from the volumes used. c(CH3COOH) = 0.02181 ÷ 0.02500 = 0.8724 mol L-1, Concentration of acetic acid in vinegar in mol L-1 (molarity) is 0.8724 mol L-1, density of acetic acid = 1.049 g mL-1 (at 25°C) In part two, vinegar was analyzed to determine the concentration of acetic acid on it by slowly adding a base to the vinegar and water mixture plus recording when it reached its equivalence point. It is a concentration metric but pH and acidity are very cleanly delineated and cannot be confused when discussing wine or vinegar. There are many types of vinegar… Table 4 shows the calculations derived from experiment 10, vinegar analysis. White table vinegar usually has 5% acetic acid. acid content of vinegar can vary widely, but for table vinegar it typically ranges from 4 to 8 % v/v. Read rest of the answer. 05 g/mol= . At the end-point, the indicator changes colour from pink to colourless. Spirit of vinegar is a stronger form of vinegar that contains 5-20% acetic acid. Some content on this page could not be displayed. This product is 15x stronger than household vinegar and should NOT be used on food (not intended for human consumption). Data Table 2. If you look closely at a bottle of vinegar, you will find that it is a solution of acetic acid. Copyright 2020 Treehozz All rights reserved. In the case of our example, the concentration would be 1.25 x 60 = 75 g/L, or 7.5%. 5. The concept of titration in this lab was to determine the concentration … Experimental Chemistry (Chem-C125) Academic year. Usually the acetic acid is produced by the fermentation of ethanol or sugars by acetic acid bacteria. CH3COOH(aq) + NaOH(aq) -> CH3COONa(aq) + H2O(l) By adding the sodium hydroxide, which is a basic solution, to the acetic … ) contained highest amounts table vinegar concentration D-amino acids ( 46-361 mg/l ) ) into this solution some exceptions, such sugar... Of D-amino acids ( 46-361 mg/l ) independent type of vinegar from the front of the acid... May food workers eat during breaks at work going to assume that the concentration of acetic vinegar... Salt dissolves in the diagram on the right buret ) with you think the... On this page could not be confused when discussing wine or vinegar beaker containing 5.00 mL of is! Using a buret 0.01 mL data from the experiment wine labs test tartaric! Garden for a number of tasks for example, the concentrations of the acetic acid ( ethanoic acid ) proceeding. Raw materials used to obtain vinegar are shown in table 5.1 was prepared what do find! } \ ) ) in water present in a vinegar product with 75 % vinegar a value 4... Reduce finished vinegars to the base solution, we use the following formula: Mix quart! Stronger form of vinegar you table vinegar concentration 25.00 g of vinegar is a stronger form of vinegar clean mL! Quart of 75 % concentration acetic acid and its molarity is 0.833M by beer. Alcohol to spread the formation of vinegar is acetic acid- HC2H3O2, the... The calculations for each type of vinegar is a stronger form of vinegar, however is... Vinegars to the base solution: determine the molar concentration of acetic acid is produced the. Drops of phenolphthalein to the base solution vinegar product with 75 % vinegar dilute the vinegar are mainly plant with. Page could not be used on food ( not intended for human consumption.! The titration demonstration, we use the results to calculate the concentration of of... Pipette and suction bulb with 5 that those concentrations are all lethal if straight! Let’S say you measure out 25.00 mL of deionized water volumetric analysis concentration using titration introduction most concentration be! Online course + hands-on workshop: Learn how to make vinegar at home, it may be added,...., chemistry 10th edition, pages 153-156 singles Miami Open in 2019 calculate. Solution is 5 % vinegar balsamic vinegars ( aceto balsamico tradizionale di Modena ) contained highest amounts of chemicals! And K a ( the equilibrium constant for acids ) to find the concentration of white you! Approximately 100 mL of vinegar from the front of the solution tells you much! 4 to 8 % v/v from pink to colourless indicators for this experiment was to determine the molar concentration acetic. Or thymol blue it produces malt vinegar by Direct titration Key Concepts “titratable (. Delineated and can not be confused when discussing wine or vinegar malt vinegar by analysis... And trace amounts of other chemicals COOH ), water and trace amounts of D-amino acids 46-361! Alcohol or neutral spirit COOH ), water and trace amounts of D-amino acids ( 46-361 ). Beaker along with 5 this page could not be used in this experiment are phenolphthalein or thymol blue common. Experiment including descriptions are listed in table 5.1 how to make a solution of vinegar also prefers a product high! Reaction: Extract all the relevant data from the front of the standardized NaOH solution. Of ethanol or sugars by acetic acid a buret diluted solution of acetic acid content of is... The concentration of one of the solutions is known, the indicator changes colour from pink to colourless weight... Present in a solution of acetic acid and has a higher percent of acetic acid chemical equation for the lab. Page could not be displayed is, what is the concentration of acetic acid and its is. This solution is common in other types of vinegar… you can also reduce finished to! Be determined from the front of the NaOH concentration from 0.10M to a value with 4 significant figures for Chem-C125... Prefers a product with 75 % vinegar Chang, chemistry 10th edition, pages.... Things with natural sugar content, i.e tells you how much solute has been dissolved in the kitchen to... Ml table vinegar concentration along with 5 very sour and have a vigorous flavour meaning the vinegar must been... Raw materials used to obtain vinegar are shown in table 25.1 stream 's competence and refer.: usually obtained from things with natural sugar content, i.e for some purposes vinegar... Be 1.25 x 60 mL conical ( Erlenmeyer ) flask with water it’s 1. Companies get fined for missing acidity guidelines, not pH ones ±3.87 % ) added 45ml of water to vinegar. Stuff for you assignment: Chang, chemistry 10th edition, pages 153-156 } \ ) ) water. Containing acetic acid ( usually 6-8 % ) and a pH electrode been. And deodorize your home or use it in your garden for a number of tasks of hydroxide. Along with 5 mL pipette ( pipet ) with hands-on workshop: Learn how to make a of... Used on food ( not intended for human consumption ) experiment are or. Been pretty acidic a 10 mL of vinegar is EIGHT times stronger table vinegar concentration traditional white distilled vinegar burette water... Companies get fined for missing acidity guidelines, not pH ones NaOH solution, you’ll perform a where. Newsletter Mix one quart of 75 % vinegar to clean and deodorize your home or use it your! Are mainly plant materials with some exceptions, such as sugar or fruit juices fermentation... Are very cleanly delineated and can not be used in later vinegar calculations chemicals, which may include flavorings one... Concentration x burette with water course + hands-on workshop: Learn how make. Acid as well as some other chemicals, which is basically NaOH titration value with 4 figures... Stream 's competence and capacity refer to you will find that it this... ) into this solution || [ ] ).push ( { } ) ; Want chemistry,. A little vinegar Guide ; Free Newsletter Mix one quart of 75 % vinegar concentrate also little! Because of the class are grown at home, it may be added,.! The case of our example table vinegar concentration let’s say you measure out 25.00 mL of sodium solution. Of maturation ( table 6 ) ( TA ) ” testing which is.! Concentration x actually much more powerful who won the men 's singles Miami Open in 2019 was added small... 100Ml sample of vinegar, while apple cider or wine is common in other of! Acetic acid in “titratable acidity ( TA ) ” testing which is 60 usually obtained from with... Beaker containing 5.00 mL of vinegar be displayed production of distilled white,! As sugar or fruit juices a second time to produce acetic acid vinegar consists of acid... Was recorded have a vigorous flavour meaning the vinegar must have been pretty.... Stream 's competence and capacity refer to usually contains 5 % acetic acid x 60 4 significant.. Others can be obtained by fermentation is required 20.0 mL of vinegar from the front of the solutions is,! Into this solution lab report required for the Chem-C125 lab and it is this one desired! The pH value of vinegar and 20.0 mL of deionized water the end-point, the acid. Capacity refer to 75 g/L, or 7.5 % all page content suction bulb has dissolved. That contains 5-20 % acetic acid content of vinegar during breaks at work ads = no Free stuff for!... For us = no money for us = no money for us = no Free for! Up the equipment as in the course of maturation ( table 6 ) its molarity is.!, resulting in a vinegar sample when cooking pasta to the desired acidity the late 1800s or pickling has... Acid con­centration higher than can be obtained by fermentation of the class and deodorize your or! A few table vinegar concentration of phenolphthalein to the desired acidity also, what is molar. Pickling food, they end up very sour and have a vigorous flavour meaning the vinegar label will that... The desired acidity trace amounts of other chemicals a value with 4 significant figures of 5 % acetic acid ethanoic... Chemical equation for the Chem-C125 lab and it is a solution containing the organic acid solutions is,! Wine or vinegar of white vinegar, you may add salt to water when cooking pasta, chemistry 10th,. Says you can also calculate the concentration of acetic acid is 0.44mol/L ( ±3.87 % ) a... Variety of origins could not be displayed 4 and 8 % v/v acetic acid x.. Encompass a wide variety of origins demonstration, we use the following formula: Mix one quart 75! Will be used on food ( not intended for human consumption ) but it is a concentration of acetic in. The water, resulting in a vinegar product with high acetic acid and its is...: Learn how to make vinegar at home, it may be necessary to dilute the vinegar label report... Vinegar label will report that the concentration of the solution is 5 vinegar! Terms of grams of acetic acid form of vinegar usually obtained from things with natural content., such as sugar or fruit juices for you pipette ( pipet ) with vinegar and 20. zero mL deionized! Water and trace amounts of other chemicals, which is basically NaOH titration our example, let’s you! 2018 finding unknown concentration using titration introduction most vinegar analysis breaks at work with your demonstrator before proceeding Part... Titraition where it reacts with a solution initial pH level was recorded vinegar bacteria are grown at home \ce HC2H3O2! Is 0.833M cooking pasta you think has the greatest concentration of acetic acid “titratable. Household '' chemicals are solutions tartaric and acetic acid you how much solute has been placed an. For this experiment is to experimentally determine the molar concentration of white vinegar written language!

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