Acids, Bases and Salts Structured Questions | Cambridge O Level Chemistry

Question 1 of 21 · 10 marks

Acids, Bases and Salts · Acid-Base Neutralisation

3 parts

Chemistry 5070 · Question 1[10 marks]

A student needs to prepare pure, dry crystals of hydrated copper(II) sulfate, $\ce{CuSO4}$ ·5 $\ce{H2O}$ .

(a)

Name TWO different solid copper compounds that can be reacted with dilute sulfuric acid to prepare copper(II) sulfate.

[2]

(b)

Describe the practical procedure for preparing pure crystals of $\ce{CuSO4}$ ·5 $\ce{H2O}$ from copper(II) oxide and dilute sulfuric acid, highlighting safety precautions and key purification steps.

[5]

(c)

A student reacts 4.00 g of copper(II) oxide with excess dilute sulfuric acid. Calculate the theoretical yield of hydrated copper(II) sulfate crystals, $\ce{CuSO4}$ ·5 $\ce{H2O}$ . [Mᵣ: CuO = 80, $\ce{CuSO4}$ ·5 $\ce{H2O}$ = 250]

[3]