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Brand Y 2.10 3.60 1. Balance the equation H;C,0,*2H,0 + N2OH → H,0 + Na,C,04. 2. What is the molarity of the titrant? M 3. Note it requires 3 moles of hydroxide to titrate 1 mole of Citric Acid a. Calculate the molarity of citric acid in both of the sample (Brand X and Y) 4. What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrogen citric acid per ml of the fruit juice sample? a. Brand X Sample:_mg/mol b. Brand Y Sample: mg/mol

Brand Y 2.10 3.60 1. Balance the equation H;C,0,*2H,0 + N2OH → H,0 + Na,C,04. 2. What is the molarity of the titrant? M 3. Note it requires 3 moles of hydroxide to titrate 1 mole of Citric Acid a. Calculate the molarity of citric acid in both of the sample (Brand X and Y) 4. What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrogen citric acid per ml of the fruit juice sample? a. Brand X Sample:_mg/mol b. Brand Y Sample: mg/mol

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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A group of students determined the titratable of two brands of tetra pack juice. Titratable acidity is a measure of the total acid concentration in a food sample. Titratable acidity in fruit are commonly expressed as (mg) of hydrous citric acid (H3CitH2, MM: 210.14 g/mol) per solution Initially, they have prepared the sodium hydroxide solution and standardized it with oxalic acid dihydrate (H2C204*2H2O; MM: 126.02 g/mol; 99.5% purity up to the faint pink endpoint of the phenolphthalein. The volumes of the duplicate trial of the standardization were summarized in the table. In the Sample analysis, 5.00 ml each of tetra pack was diluted with 50.0 ml of distilled water and titrated up to the end point of 8.2 using a pH meter. Consider the tables below and answer the following questions. T1. Standardization of the NaOH titrant Grams of primary standard Volume NaOH used (ml) þ.2490 39.4 0.2510 39.5 T2. Titration of the Sample with the standardized titrant. Sample Volume Readout of Burette (ml, NaOH) Initial Final Brand X 0.00 1.90 Brand Y 2.10 3.60 1. Balance the equation H;C;0,*2H,0 + NaOH > H;0 + Na,C,O4. 2. What is the molarity of the titrant? _M 3. Note it requires 3 moles of hydroxide to titrate 1 mole of Citric Acid a. Calculate the molarity of citric acid in both of the sample (Brand X and Y) 4. What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrogen citric acid per ml of the fruit juice sample? a. Brand X Sample:_mg/mol b. Brand Y Sample:_mg/mol
Transcribed Image Text:A group of students determined the titratable of two brands of tetra pack juice. Titratable acidity is a measure of the total acid concentration in a food sample. Titratable acidity in fruit are commonly expressed as (mg) of hydrous citric acid (H3CitH2, MM: 210.14 g/mol) per solution Initially, they have prepared the sodium hydroxide solution and standardized it with oxalic acid dihydrate (H2C204*2H2O; MM: 126.02 g/mol; 99.5% purity up to the faint pink endpoint of the phenolphthalein. The volumes of the duplicate trial of the standardization were summarized in the table. In the Sample analysis, 5.00 ml each of tetra pack was diluted with 50.0 ml of distilled water and titrated up to the end point of 8.2 using a pH meter. Consider the tables below and answer the following questions. T1. Standardization of the NaOH titrant Grams of primary standard Volume NaOH used (ml) þ.2490 39.4 0.2510 39.5 T2. Titration of the Sample with the standardized titrant. Sample Volume Readout of Burette (ml, NaOH) Initial Final Brand X 0.00 1.90 Brand Y 2.10 3.60 1. Balance the equation H;C;0,*2H,0 + NaOH > H;0 + Na,C,O4. 2. What is the molarity of the titrant? _M 3. Note it requires 3 moles of hydroxide to titrate 1 mole of Citric Acid a. Calculate the molarity of citric acid in both of the sample (Brand X and Y) 4. What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrogen citric acid per ml of the fruit juice sample? a. Brand X Sample:_mg/mol b. Brand Y Sample:_mg/mol
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