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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 13, Problem 18E
Textbook Problem
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What acids are present in wines? What kind of flavor does each impart to wine?

Interpretation Introduction

Interpretation:

Types of acid present in wine and the flavors associated with these acids are to be explained.

Concept Introduction:

Wine is an alcoholic beverage made from fermented grapes. It is of various kinds such as red, white, sweet, dry, sparkling, and so on. The conversion of grape sugar to ethanol and carbon dioxide is described as the fundamental biochemical reaction involved in the wine making process.

The reaction is as follows:

C6H12O6 + Yeast  2C2H5OH + 2CO2

Explanation of Solution

Acidity in wines originates mainly from two sources. First, from the organic acid which is extracted from grapes such as the tartaric, malic, citric acids. The second factor is the yeast and bacteria that help introduce acidity in wine through the process of fermentation. The roles of acids that are present in wine are as follows:

Tartaric acid: It is an important ingredient in the wine making process, due to the key role it plays in the chemical stability of wine, its color and it also influences the wine’s taste. The influence of tartaric acid on the taste and texture of a wine is due to the ‘tartness’ in it. Tartaric acid crystals are used approximately 1g/L in wine to reduce the pH of the wine or create acidity in wine.

Malic acid: It is one of the principle acids found in wines. It is found in nearly every fruit and berry plant, but is mostly associated with green apples. In wine, malic acid is included in several processes that are important for taste, health, and sustainability of a wine...

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Chapter 13 Solutions

Chemistry In Focus
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Ch. 13 - Why are bases not commonly found in foods?Ch. 13 - List four common laboratory bases and their uses.Ch. 13 - What are the Arrhenius definitions of acids and...Ch. 13 - What are the Brnsted-Lowry definitions of acids...Ch. 13 - What is the difference between a strong acid and a...Ch. 13 - The pH scale is a logarithmic scale. What is meant...Ch. 13 - What pH range is considered acidic? Basic?...Ch. 13 - What acid is responsible for the sour taste of...Ch. 13 - What is pickling? What acid is responsible for the...Ch. 13 - Where can you find acetic acid?Ch. 13 - What is aspirin? How does it work?Ch. 13 - List several common acids and where they might be...Ch. 13 - What acids are present in wines? What kind of...Ch. 13 - What is an alkaloid?Ch. 13 - What causes acid indigestion? List some common...Ch. 13 - How does an antacid work?Ch. 13 - Explain how a leavening agent works.Ch. 13 - Which pollutants are responsible for acid rain?...Ch. 13 - Why is rain acidic even in the absence of...Ch. 13 - How acidic is rain in the United States? Can this...Ch. 13 - Why can some lakes and soils tolerate acid rain...Ch. 13 - What are the effects of acid rain on the...Ch. 13 - What is being done to decrease the acidity of U.S....Ch. 13 - Write a chemical equation to show the...Ch. 13 - Write a chemical equation to show the...Ch. 13 - Identify the Brnsted-Lowry acid and base in each...Ch. 13 - Identify the Brnsted-Lowry acid and base in each...Ch. 13 - Write a chemical equation using Lewis structures...Ch. 13 - Write a chemical equation using Lewis structures...Ch. 13 - A chemist makes two solutions. One is a 0.01-MHCl...Ch. 13 - A chemist makes a 0.001-MNaOH solution and a...Ch. 13 - Give the pH that corresponds to each solution and...Ch. 13 - Give the pH that corresponds to each solution and...Ch. 13 - What is the [H3O+] in a solution with a pH of 4?Ch. 13 - What is the [H3O+] in a solution with a pH of 11?Ch. 13 - Write chemical reactions to show how each antacid...Ch. 13 - Write chemical reactions to show how each antacid...Ch. 13 - Suppose that the stomach contains...Ch. 13 - Suppose that 250.0 mL of a basic solution is 0.100...Ch. 13 - Write a chemical reaction to show how SO2 forms...Ch. 13 - Write a chemical reaction to show how NO2 forms...Ch. 13 - Write a short paragraph explaining why a person...Ch. 13 - Examine the household chemicals shelf at your...Ch. 13 - Determine from the following molecular view of a...Ch. 13 - Determine from the following molecular view of a...

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