World of Chemistry
World of Chemistry
7th Edition
ISBN: 9780618562763
Author: Steven S. Zumdahl
Publisher: Houghton Mifflin College Div
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Chapter 7, Problem 1A
Interpretation Introduction

Interpretation :

The visual changes indicating a chemical reaction taking place must be explained.

Concept Introduction :

Visual changes of chemical reactions are those which can be seen during the progress of the reactions.

Expert Solution & Answer
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Answer to Problem 1A

Some of the visual changes which indicate that a chemical reaction is taking place are color change of solution, evolution of colored gas, effervescence, formation of precipitates or solids from soluble substances etc.

Explanation of Solution

As in chemical reaction new substances are produced with different properties, often visual changes can be seen during the progress of the reaction.

For example, if a solid piece of sodium is added to ethyl alcohol (liquid) then evolution of hydrogen gas can be understood from the effervescence.

When aqueous solution of silver nitrate is allowed to react with aqueous solution of sodium chloride then a precipitate of silver chloride is produced.

When concentrated nitric acid is heated with copper turnings then reddish brown nitrogen dioxide evolves.

Thus visual changes indicate that a chemical reaction is taking place.

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Chapter 7 Solutions

World of Chemistry

Ch. 7.1 - Prob. 1RQCh. 7.1 - Prob. 2RQCh. 7.1 - Prob. 3RQCh. 7.2 - Prob. 1RQCh. 7.2 - Prob. 2RQCh. 7.2 - Prob. 3RQCh. 7.2 - Prob. 4RQCh. 7.3 - Prob. 1RQCh. 7.3 - Prob. 2RQCh. 7.3 - Prob. 3RQ
Ch. 7.3 - Prob. 4RQCh. 7.3 - Prob. 5RQCh. 7 - Prob. 1ACh. 7 - Prob. 2ACh. 7 - Prob. 3ACh. 7 - Prob. 4ACh. 7 - Prob. 5ACh. 7 - Prob. 6ACh. 7 - Prob. 7ACh. 7 - Prob. 8ACh. 7 - Prob. 9ACh. 7 - Prob. 10ACh. 7 - Prob. 11ACh. 7 - Prob. 12ACh. 7 - Prob. 13ACh. 7 - Prob. 14ACh. 7 - Prob. 15ACh. 7 - Prob. 16ACh. 7 - Prob. 17ACh. 7 - Prob. 18ACh. 7 - Prob. 19ACh. 7 - Prob. 20ACh. 7 - Prob. 21ACh. 7 - Prob. 22ACh. 7 - Prob. 23ACh. 7 - Prob. 24ACh. 7 - Prob. 25ACh. 7 - Prob. 26ACh. 7 - Prob. 27ACh. 7 - Prob. 28ACh. 7 - Prob. 29ACh. 7 - Prob. 30ACh. 7 - Prob. 31ACh. 7 - Prob. 32ACh. 7 - Prob. 33ACh. 7 - Prob. 34ACh. 7 - Prob. 35ACh. 7 - Prob. 36ACh. 7 - Prob. 37ACh. 7 - Prob. 38ACh. 7 - Prob. 39ACh. 7 - Prob. 40ACh. 7 - Prob. 41ACh. 7 - Prob. 42ACh. 7 - Prob. 43ACh. 7 - Prob. 44ACh. 7 - Prob. 45ACh. 7 - Prob. 46ACh. 7 - Prob. 47ACh. 7 - Prob. 48ACh. 7 - Prob. 49ACh. 7 - Prob. 1STPCh. 7 - Prob. 2STPCh. 7 - Prob. 3STPCh. 7 - Prob. 4STPCh. 7 - Prob. 5STPCh. 7 - Prob. 6STPCh. 7 - Prob. 7STPCh. 7 - Prob. 8STPCh. 7 - Prob. 9STPCh. 7 - Prob. 10STPCh. 7 - Prob. 11STPCh. 7 - Prob. 12STP
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