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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 4E
Textbook Problem
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What is litmus paper? What is a litmus test?

Interpretation Introduction

Interpretation:

Litmus paper and the litmus paper test are to be explained.

Concept introduction:

Litmus paper is one of the simplest and oldest methods to determine the acidity or basicity of a solution. This paper is treated with the natural dye that originates from certain species of lichens. A litmus test is done by pouring the sample solution on the litmus paper and observing the color change of litmus paper. The color change is significant, therefore easily detectable.

A litmus test is quite reliable, safe and easy. Hence, it is widely used in school and various laboratories.

Explanation of Solution

Given information: Litmus paper and litmus test.

Litmus paper is one of the most reliable and oldest indicators in the list of pH indicators. It is a type of pH paper treated with natural dye, originating from some certain species of lichens. These lichens are considered as fungi and the dye associated with them is very sensitive towards the ions present in an acid or a base, because such ions are electrically charged and react rapidly to neutralize themselves. This mechanism helps the paper to impart color, depending upon the nature of the solution...

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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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