Quiz: The pH Scale

1. The neutral value on the pH scale is
a. less than 7
b. greater than 7
c. equal to 7
2. Water dissociates into H+ and OH– ions
a. to a large degree
b. to a small degree
c. not at all
3. The value of the ionization constant for water, Kw is
a. 1.0 × 10–7
b. 1.0 × 1014
c. 1.0 × 10–14
4. The pH scale is
a. a logarithmic scale
b. a linear scale
c. an exponential scale
5. What is the [H+] of a solution if the pH is 3.5?
a. 3.16 × 104
b. 3.16 × 10–4
c. 3.5 × 10–4
6. A solution has a [H+] = 7.0 × 10–11. What is its pH?
a. 10.15
b. –10.15
c. 11.00
7. A solution has a [OH–] = 1.3 × 10–3. This solution would be classified as
a. acidic
b. basic
c. neutral
8. Bases have a pH
a. less than 7
b. equal to 7
c. greater than 7
9. An acidic solution has
a. a greater concentration of hydroxide ions than hydrogen ions
b. a greater concentration of hydrogen ions than hydroxide ions
c. equal concentrations of hydrogen ions and hydroxide ions
10. A solution has a hydrogen ion concentration of 3.7 × 10–2. What is its hydroxide ion concentration?
a. 2.7 × 10–13
b. 3.7 × 10–16
c. 3.7 × 1012

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