3. Water

In a neutral solution, the concentration of __________.

A base _______:

Which of the following statements about buffers is true?

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

a. 4.0 M

b. 10¹⁰M

c. 10⁴M

d. 10⁴M

What is the hydroxide ion concentration of the lake described in question 3?

a. 10⁻¹⁰ M

b. 10⁻⁴ M

c. 10⁻⁷ M

d. 10.0 M

A solution at pH 6 contains _________ H+ than the same amount of a solution at pH 8.

a. 20 times more

b. 100 times more

c. 2 times less

d. 100 times less

A can of cola consists mostly of sugar dissolved in water, with some carbon dioxide gas that makes it fizzy and makes the pH less than 7. In chemical terms, you could say that cola is an aqueous solution where water is the _________, sugar is a _________, and carbon dioxide makes the solution _________.

a. solvent . . . solute . . . basic

b. solute . . . solvent . . . basic

c. solvent . . . solute . . . acidic

d. solute . . . solvent . . . acidic