A group of chemistry students determined the titratable acidity of two brands of tetrapack juice. Titratable acidity is a measure of the total acid concentration in a food sample. Titratable acidity in fruit juices is commonly expressed in terms of milligrams (mg) of hydrous citric acid (H3CitH20, MM: 210.14 g/mol) per mL solution. Initially, they have prepared the sodium hydroxide solution and standardized it with oxalic acid dihydrate (H2C204•2H20; MM:126.02 g/mol; 99.5% purity) up to the faint pink endpoint of phenolphthalein. The volumes of the duplicate trial of the standardization were summarized in the table. In the sample analysis, 5.00mL each of tetra pack juice was diluted with 50.0 mL of distilled water and titrated up to an endpoint of 8.2 using a pH meter. Consider the tables below and answer the following questions. Table 1. Standardization of the NaOH titrant grams of primary standard Volume NaOH used (mL) 0.2490 39.4 0.2510 39.5 Table 2. Titration of the samples with the standardized titrant. Volume Readout of Burette (mL, NAOH) Sample Initial Final Brand X 0.00 1.90 Brand Y 2.10 3.60 What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrous citric acid per mL of fruit juice sample? Band X sample. mg/mL Brand Y sample mg/mL
A group of chemistry students determined the titratable acidity of two brands of tetrapack juice. Titratable acidity is a measure of the total acid concentration in a food sample. Titratable acidity in fruit juices is commonly expressed in terms of milligrams (mg) of hydrous citric acid (H3CitH20, MM: 210.14 g/mol) per mL solution. Initially, they have prepared the sodium hydroxide solution and standardized it with oxalic acid dihydrate (H2C204•2H20; MM:126.02 g/mol; 99.5% purity) up to the faint pink endpoint of phenolphthalein. The volumes of the duplicate trial of the standardization were summarized in the table. In the sample analysis, 5.00mL each of tetra pack juice was diluted with 50.0 mL of distilled water and titrated up to an endpoint of 8.2 using a pH meter. Consider the tables below and answer the following questions. Table 1. Standardization of the NaOH titrant grams of primary standard Volume NaOH used (mL) 0.2490 39.4 0.2510 39.5 Table 2. Titration of the samples with the standardized titrant. Volume Readout of Burette (mL, NAOH) Sample Initial Final Brand X 0.00 1.90 Brand Y 2.10 3.60 What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrous citric acid per mL of fruit juice sample? Band X sample. mg/mL Brand Y sample mg/mL
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
Related questions
Concept explainers
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
Question
Hi! I need help on the two blank boxes below. Thank u!
Transcribed Image Text:A group of chemistry students determined the titratable acidity of two brands of tetrapack juice. Titratable
acidity is a measure of the total acid concentration in a food sample. Titratable acidity in fruit juices is commonly
expressed in terms of milligrams (mg) of hydrous citric acid (H3CitH20, MM: 210.14 g/mol) per ml solution.
Initially, they have prepared the sodium hydroxide solution and standardized it with oxalic acid dihydrate
(H2C204•2H20; MM:126.02 g/mol; 99.5% purity) up to the faint pink endpoint of phenolphthalein. The volumes of
the duplicate trial of the standardization were summarized in the table. In the sample analysis, 5.00mL each of
tetra pack juice was diluted with 50.0 mL of distilled water and titrated up to an endpoint of 8.2 using a pH meter.
Consider the tables below and answer the following questions.
Table 1. Standardization of the NaOH titrant
grams of primary standard
Volume NaOH used (mL)
0.2490
39.4
0.2510
39.5
Table 2. Titration of the samples with the standardized titrant.
Volume Readout of Burette (mL, NAOH)
Sample
Initial
Final
Brand X
0.00
1.90
Brand Y
2.10
3.60
What is the titratable acidity of the tetra pack fruit juice in terms of mg of hydrous citric acid per mL of fruit juice
sample?
Band X sample.
mg/mL
Brand Y sample
mg/mL
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
