Explanation Vinegar contains approximately 5 % of acetic acid ( K a = 1.8 × 10 − 5 ) . Lemon juice contains approximately 1 % of citric acid ( H 3 C 6 H 5 O 7 ) . Lactic acid ( C 3 H 6 O 3 , K a = 1.4 × 10 − 4 ) is a 100 % pure molecular acid. The neutralization reaction can be written as given below. H 3 O + ( a q ) + H C O 3 − ( a q ) ⇌ H 2 C O 3 ( a q ) + H 2 O ( l ) The equilibrium constant is given below. K = 1 K a , H 2 C O 3 = 1 4.3 × 10 − 7 = 2.3 × 10 6 . As lactic acid, acetic acid and citric acid each presumably have K a > 10 − 7 , the three neutralization reactions will be product favored as K > 1. The general neutralization reaction can be written as shown below. H A ( a q ) + H 2 O ( l ) ⇌ H 3 O + ( a q ) + A − ( a q ) K a , H A So it is needed to determine which sample provides the largest number of H 3 O + ions. If one gram of lactic acid reacts, the number of moles of H 3 O + ions will be available is given below. 1 g C 3 H 6 O 3 × 1 m o l C 3 H 6 O 3 90.08 g C 3 H 6 O 3 × 1 m o l H 3 O + 1 m o l C 3 H 6 O 3 = 0

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Author: John W. Moore, Conrad L. Stanitski

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Chapter 14, Problem 124QRT

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Among 1 g of vinegar, lemon juice and lactic acid, the one which produces most carbon dioxide gas upon reaction with equal masses of baking soda has to be determined.

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Chapter 14, Problem 123QRT

Chapter 14, Problem 125QRT

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6. A buffer is prepared by adding 20.0 g of sodium acetate (CH3COONa) to 500 mL of a 0.150 M acetic acid (CH3COOH) solution. (A) write the complete ionic equation for the reaction that occurs when a few drops of hydrochloric acid are added to the buffer. (B) Write the complete ionic equation for the reaction that occurs when few drops of sodium hydroxide solution are added to the buffer. Group of answer choices a.) (A) CH3COO-(aq)+ H+ (aq) --->CH3COOH(aq) (B) CH3COOH(aq) + OH-(aq)--->CH3COO-(aq)+H2O(l) b.) (A) Na+ (aq)+ CH3COO-(aq)+ H+ (aq)+CI-(aq) --->CH3COOH(aq)+Na+(aq)+CI-(aq) (B) CH3COOH(aq)+Na+(aq)+ OH-(aq)--->CH3COO-(aq)+H2O(l)+Na+(aq) c.) (A) Na+ (aq)+ CH3COO-(aq)+ H+ (aq)+CI-(aq) --->CH3COOH(aq)+Na+(aq)+CI-(aq) (B) CH3COOH(aq) + OH-(aq)--->CH3COO-(aq)+H2O(l) d.) (A) CH3COO-(aq)+ H+ (aq) --->CH3COOH(aq) (B) CH3COOH(aq)+Na+(aq)+ OH-(aq)--->CH3COO-(aq)+H2O(l)+Na+(aq)

> Sodium hydrogen carbonate (NaHCO3), also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCI), which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction: HCl(aq) + NaHCO3(aq) → NaCl(aq) + H₂O(1) + CO₂(g) - A The CO₂ gas produced is what makes you burp after drinking the solution. ol Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 200. mL of a 0.067 M HCl solution. What mass of NaHCO3 would he need to ingest to neutralize this much HCl ? Round your answer to 2 significant digits. ng 5.0 x10 X ? 5 Was

Chapter 14 Solutions

Chemistry: The Molecular Science

Ch. 14.1 - Identify each molecule or ion as a Brnsted-Lowry...Ch. 14.1 - Using Le Chatelier’s Principle Use Le Chatelier’s...Ch. 14.1 - Prob. 14.3E Ch. 14.1 - Complete the table. Ch. 14.1 - Prob. 14.4E Ch. 14.1 - Prob. 14.5E Ch. 14.2 - Prob. 14.6CE Ch. 14.2 - Prob. 14.7E Ch. 14.3 - Prob. 14.2PSP Ch. 14.3 - Prob. 14.3PSP

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Among 1 g of vinegar, lemon juice and lactic acid, the one which produces most carbon dioxide gas upon reaction with equal masses of baking soda has to be determined.

Solution Summary: The author explains that vinegar, lemon juice and lactic acid produce most carbon dioxide gas upon reaction with equal masses of baking soda.

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Interpretation: Among 1 g of vinegar, lemon juice and lactic acid, the one which produces most carbon dioxide gas upon reaction with equal masses of baking soda has to be determined.

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Chapter 14 Solutions

Interpretation:

Among 1 g of vinegar, lemon juice and lactic acid, the one which produces most carbon dioxide gas upon reaction with equal masses of baking soda has to be determined.