Formulae and Equations 1 – P4

Magnesium carbonate reacts with hydrochloric acid to form calcium chloride, carbon dioxide and water.

Complete the symbol equation for this reaction.
MgCO₃ + HCl → MgCl₂ + __ + H₂O

MgCO₃ + 2HCl → MgCl₂ + CO₂ + H₂O

b. Magnesium reacts with steam.
Mg(s) + H2O(g)  MgO(s) + H2(g)
Write a word equation for this reaction.

Magnesium + Water → Magnesium Chloride + Hydrogen gas

Write the formulae for magnesium sulfate and magnesium sulfide.

Magnesium Sulphate (Mg²⁺ + SO₄^2-):

MgSO₄

Magnesium Sulphide: (Mg²⁺ + S^2-):

MgS

2. At high temperature and pressure, in the presence of a catalyst, nitrogen reacts with hydrogen to form ammonia, NH₃.

a. Write a word equation for this reaction. Include all the information in the question.

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b. Complete the balanced equation for this reaction. N2 + ___ → 2NH3

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c. Aqueous ammonia reacts with sulfuric acid to form a salt.
i. Complete the equation for this reaction.

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ii. State the name of the salt formed.

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3. This question is about potassium and potassium

a. Potassium reacts with water to form potassium hydroxide and hydrogen.
Write a balanced equation for this reaction to include state symbols.

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b. An aqueous solution of magnesium bromide reacts with aqueous silver nitrate, AgNO3, to form a precipitate of silver bromide and a solution of magnesium nitrate.
i. Write a full symbol equation for this reaction.

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ii. Convert this equation into an ionic equation to include state symbols.

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iii. Which ions do not take part in this reaction?

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