GCSE Edexcel Chemistry Making insoluble salts: 2. The table shows some salts th

Question

2. The table shows some salts that are soluble and some that are insoluble in water.

(a) An insoluble salt can be prepared by mixing two salt solutions.
Choose two salts from the table that can be reacted together to form lead carbonate.

and

(b) Barium chloride solution reacts with copper sulfate solution.
barium chloride + copper sulfate → barium sulfate + copper chloride
Explain what is seen when solutions of barium chloride and copper sulfate are mixed.

(c) A 'barium meal' may be given to a patient before an X-ray is taken.
A 'barium meal' is a suspension of barium sulfate in water.
Give one reason why barium sulfate is used in this way.

(d) Complete the sentences by putting a cross (X) in the box next to your answer.

(i) The table shows that copper chloride is soluble in water.
This suggests that the structure of copper chloride is

☐ A simple molecular, covalent
 ☐ B giant molecular, covalent
 ☐ C ionic
 ☐ D metallic

(ii) Sodium carbonate is an ionic compound.
The most likely melting point of sodium carbonate is

☐ A -85 °C
 ☐ B 17 °C
 ☐ C 146 °C
 ☐ D 851 °C

(e) Sodium carbonate contains sodium ions, Na⁺, and carbonate ions, CO₃²⁻.
Give the formula for sodium carbonate.

2. The table shows some salts that are soluble and some that are insoluble in water - Edexcel - GCSE Chemistry - Question 2 - 2012 - Paper 1

Worked Solution & Example Answer:2. The table shows some salts that are soluble and some that are insoluble in water - Edexcel - GCSE Chemistry - Question 2 - 2012 - Paper 1

An insoluble salt can be prepared by mixing two salt solutions.

Explain what is seen when solutions of barium chloride and copper sulfate are mixed.

Give one reason why barium sulfate is used in this way.

The table shows that copper chloride is soluble in water. This suggests that the structure of copper chloride is

The most likely melting point of sodium carbonate is

Give the formula for sodium carbonate.

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