Reacting acids with carbonates

3 marks · Easy

Hydrochloric acid reacts with magnesium carbonate in an aqueous solution.

(a)

Write the balanced chemical equation for this reaction.

[2 marks]

(b)

Name the salt formed in this reaction.

[1 mark]

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

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(a) \ce{MgCO3(s) + 2HCl(aq) -> MgCl2(aq) + CO2(g) + H2O(l)} · must show Balanced equation, State symbols (not required for full marks if omitted)

(b) magnesium chloride · must show Correct name: magnesium chloride

Common mistakes: Incorrect balancing of equation; Naming the salt incorrectly

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Marking points

M1 (a) · 1 mark · Correct formulae for all reactants and products with physical states, not necessarily balanced.

A1 (a) · 1 mark · Correctly balances the chemical equation.

B1 (b) · 1 mark · Names the correct salt: magnesium chloride.

Worked solution

a) The balanced equation is:

b) The salt formed is magnesium chloride.