Study Guide to Content Mastery

T200
Date Class Name Date Class

Name

CHAPTER Section 15.1 continued
10. As sodium chloride dissolves in water, what happens to the sodium and chloride ions?

15
The sodium and chloride ions are separated and surrounded by the water molecules.
11. Explain the orientation of the water molecules around the sodium ions and chloride ions.

STUDY GUIDE FOR CONTENT MASTERY

CHAPTER

15

STUDY GUIDE FOR CONTENT MASTERY

Solutions

Section 15.1

What are solutions?

In your textbook, read about the characteristics of solutions.

Use each of the terms below just once to complete the passage. soluble solute solvent solution

Because the sodium ion is positively charged, it attracts the negatively charged portion of the water molecule (the oxygen atom) and repels the positively charged portion of the water molecule (the hydrogen atoms). Because the chloride ion is negatively charged, it attracts the positively charged portion of the water molecule and repels the negatively charged portion.
12. How does the strength of the attraction between water molecules and sodium and

immiscible

liquid

Chemistry: Matter and Change of oxygen gas dissolved in nitrogen

insoluble

miscible

Air is a(n) (1)

solution solute
, and nitrogen is the

gas. The oxygen in air is the (2)

(3)

solvent Liquid solutions are the most common

. Because oxygen gas dissolves in a solvent, oxygen gas

is a(n) (4)

soluble

chloride ions compare with the strength of the attraction between the sodium ions and chloride ions? How do you know?

substance. A substance that does not dissolve is

(5)

insoluble

The attraction between the water molecules and the sodium and chloride ions is greater than the attraction between the sodium and chloride ions. The greater strength of attraction between the water molecules and the ions is what causes the solvation process to occur.
13. List three ways that the rate of solvation may be increased.