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Which observation is consistent with a chemical reaction

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 25P Chapter 7

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 25P

PROBLEM 25P

Which observation is consistent with a chemical reaction occurring? Why?

(a) Solid copper deposits on a piece of aluminum foil when the foil is placed in a blue copper nitrate solution. The blue color of the solution fades.

(b) Liquid ethyl alcohol turns into a solid when placed in a low-temperature freezer.

(c) A white precipitate forms when solutions of barium nitrate and sodium sulfate are mixed.

(d) A mixture of sugar and water bubbles when yeasts are added. After several days, the sugar is gone and ethyl alcohol is found in the water.

Step-by-Step Solution:
Step 1 of 3

Solution 25P

(a) Solid copper deposits on a piece of aluminum foil when the foil is placed in a blue copper nitrate solution. The blue color of the solution fades.

A chemical reaction happens here since there is a change in color can be observed which is characteristic of a chemical reaction

(b) Liquid ethyl alcohol turns into a solid when placed in a low-temperature freezer.

No chemical reaction happens here since only a change in phase occurs...

Step 2 of 3

Chapter 7, Problem 25P is Solved
Step 3 of 3

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

Since the solution to 25P from 7 chapter was answered, more than 418 students have viewed the full step-by-step answer. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. The answer to “Which observation is consistent with a chemical reaction occurring? Why?(a) Solid copper deposits on a piece of aluminum foil when the foil is placed in a blue copper nitrate solution. The blue color of the solution fades.(b) Liquid ethyl alcohol turns into a solid when placed in a low-temperature freezer.(c) A white precipitate forms when solutions of barium nitrate and sodium sulfate are mixed.(d) A mixture of sugar and water bubbles when yeasts are added. After several days, the sugar is gone and ethyl alcohol is found in the water.” is broken down into a number of easy to follow steps, and 90 words. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. The full step-by-step solution to problem: 25P from chapter: 7 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. This full solution covers the following key subjects: alcohol, Water, sugar, solution, Blue. This expansive textbook survival guide covers 19 chapters, and 2045 solutions.

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