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[Maximum number: 1]

Aqueous ammonium sulfate is made by reacting aqueous ammonia with dilute sulfuric acid.
How is solid ammonium sulfate obtained from the resulting solution?

A

crystallisation

B

distillation

C

filtration

D

solvent extraction

[Maximum number: 1]

The equation for the reaction between barium chloride and dilute sulfuric acid is shown.

\mathrm{BaCl}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{BaSO}_{4}+2 \mathrm{HCl}

Which row shows the state symbols for this equation?

$\mathrm{BaCl}_{2}$

$\mathrm{H}_{2} \mathrm{SO}_{4}$

$\mathrm{BaSO}_{4}$

2 HCl

$(\mathrm{aq})$

$(\mathrm{s})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{s})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{s})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{I})$

$(\mathrm{aq})$

$(\mathrm{I})$

[Maximum number: 1]

P is a hydrated metal salt with a blue colour. When P is heated, water is given off, leaving solid Q.
R is a hydrated metal salt with a pink colour. When R is heated, water is given off, leaving solid S.
Which row gives the name of P and the colour of S ?

name of P

colour of S

hydrated cobalt(II) chloride

blue

hydrated cobalt(II) chloride

white

hydrated copper(II) sulfate

blue

hydrated copper(II) sulfate

white

CAIE IGCSE Chemistry 7.3 Preparation of Salts Topic Practice

Question 1

Question 2

Question 3