1.
The solubility of solid dissolved in a liquid increases with
- increase of temperature.
- decrease of temperature.
- temperature does not effect solubility.
- None of the above.
Exercises 9.5 Exercises
2.
Dissolving a solute in a liquid
- increases the freezing point of liquid.
- decreases the freezing point of liquid.
- does not the freezing point.
- does any of the above, depending on the substance involved.
3.
Which of the following statements is true concerning acids and bases?
- acids and bases don’t react with each other.
- acids mixed with bases neutralize each other.
- acids mixed with bases make stronger bases.
- acids mixed with bases make stronger acids.
4.
True or false: bases are sometimes called alkalis.
- True.
- False.
5.
Which is true?
- pH of less than 7 is basic; pH of more than 7 is acidic.
- pH of less than 7 is acidic; pH of more than 7 is basic.
6.
Which substance completely dissociates in water?
- Weak acids.
- Strong acids.
7.
What is the pH of a neutral solution?
- 7
- 0
- 14
- 1
8.
Which of the following is a strong acid?
- HClO
- HF
- \(\displaystyle H_2SO_4\)
- \(\displaystyle HNO_3\)
Answer.
c.
9.
Which of the following is a weak base?
- KOH
- NaOH
- \(\displaystyle NH_3\)
- \(\displaystyle Ca(OH)_2\)
Answer.
c.
10.
What is the product of the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?
- Water and sodium chloride.
- Carbon dioxide and sodium chloride.
- Water and sodium carbonate.
- None of the above.>
Answer.
a.
