Copper(II) oxide reacts with dilute nitric acid. Which salt is formed?
Answer and explanation
Correct answer: C. Copper(II) nitrate
- Step 1: A metal oxide reacts with an acid to give a salt and water.
- Step 2: Nitric acid forms nitrates, so the salt is copper(II) nitrate.
Answer
Copper(II) nitrate.
Why not the others: Copper(II) chloride: chlorides come from hydrochloric acid. Copper(II) sulfate: sulfates come from sulfuric acid. Copper(II) nitrite: nitrites come from nitrous acid.
Practise more Rates, Acids and Nature's Chemistry.
Free questions with an explanation for every one, and full timed National 5 (Scotland) mock tests.
More Rates, Acids and Nature's Chemistry questions
- 24 cm³ of gas is collected in 30 seconds during a reaction. What is the average rate?
- On a graph of volume of gas against time, one reaction line is steeper than another. What does this show?
- Why does raising the temperature increase the rate of a reaction?
- What does a catalyst do?
- Why does powdered calcium carbonate react faster with acid than the same mass of marble chips?
- In a reaction 12 cm³ of gas has formed after 20 s and 30 cm³ after 60 s. What is the average rate between 20 s and 60 s?