Question
Aqueous ethanoic acid is a weak acid. Aqueous sodium hydroxide is a strong base. Aqueous ethanoic acid is neutralised by aqueous sodium hydroxide. Which statements are correct?
1 Aqueous ethanoic acid accepts protons from hydroxide ions.
2 The aqueous ethanoic acid used is fully dissociated into ions.
3 The aqueous sodium hydroxide used is fully dissociated into ions.
4 The reaction produces a salt and water.
A. 1 and 2 B. 1 and 3 C. 2 and 4 D. 3 and 4
Answer/Explanation
Ans:
D
Question
How many species are acting as bases in this reversible reaction?
\(HNO_{3}+H_{2}O\rightleftharpoons H_{3}O^{+}+NO_{3}^{-}\)
A. 3 B. 2 C. 1 D. 0
Answer/Explanation
Ans:
B
Question
Water is added to anhydrous copper(II) sulfate.
What happens during the reaction?
- The copper(II) sulfate turns blue and the solution formed gets colder.
- The copper(II) sulfate turns blue and the solution formed gets hotter.
- The copper(II) sulfate turns white and the solution formed gets colder.
- The copper(II) sulfate turns white and the solution formed gets hotter.
Answer/Explanation
Ans:
B
Question
Which statement about acids is correct?
- A strong acid has a higher pH than a weak acid of the same concentration.
- A strong acid is a proton acceptor.
- A weak acid is a proton donor.
- A weak acid is fully ionized in aqueous solution.
Answer/Explanation
Ans:
C