Chemistry 5070 · O Level · Preparation of salts

Preparation of salts — practice question

Silver chloride, $\text{AgCl}$, is an insoluble salt whereas silver nitrate is a soluble salt.
(a(i))[3]

Silver chloride is made by reacting aqueous silver nitrate with dilute hydrochloric acid. Describe how to obtain a pure, dry sample of silver chloride from aqueous silver nitrate and dilute hydrochloric acid.

(a(ii))[2]

Write the ionic equation, complete with state symbols, for this reaction.

(b(i))[1]

Silver chloride breaks down when light is present to form silver and chlorine. What is the name of the reaction type that needs light?

(b(ii))[1]

Construct the equation showing the decomposition of silver chloride.

(c)[3]

Silver nitrate may be made by reacting silver oxide with dilute nitric acid. $\text{Ag}_2\text{O} + 2\text{HNO}_3 \rightarrow 2\text{AgNO}_3 + \text{H}_2\text{O}$ An excess of silver oxide is treated with $30.0\,\text{cm}^3$ of $0.150\,\text{mol dm}^{-3}$ nitric acid. Once purified, the percentage yield of silver nitrate is $80.0\%$. Calculate the mass of silver nitrate prepared. Give your answer to three significant figures. $[M_r: \text{AgNO}_3, 170]$

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