Key Concept: Acids react with metals, bases and carbonates to form salts. Different reactions release different gases.
Section A: Word Equations
1. Complete the word equations. [3]
a) Acid + metal -> ____ + ____
b) Acid + base -> ____ + ____
c) Acid + carbonate -> ____ + ____ + ____
2. Write a balanced symbol equation for magnesium reacting with hydrochloric acid. [2]
3. Write a balanced symbol equation for copper(II) oxide reacting with sulfuric acid. [2]
4. Name the gas released when an acid reacts with a carbonate and state a test for it. [2]
Total marks: 9
Mark Scheme
1. a) salt + hydrogen b) salt + water c) salt + water + carbon dioxide [3]
2. Mg + 2HCl -> MgCl2 + H2 [2]
3. CuO + H2SO4 -> CuSO4 + H2O [2]
4. Carbon dioxide; turns limewater milky [2]