GCSE Edexcel Chemistry Making soluble salts: 3 (a) Solutions of soluble salts

Question

3 (a) Solutions of soluble salts can react together to form an insoluble salt.
What name is given to this type of reaction?
Put a cross (✓) in the box next to your answer.

A      combustion
B      neutralisation
C      precipitation
D      separation

(b) Information about the solubility of some salts is given below.

- all nitrates are soluble
- all common carbonates are insoluble except sodium carbonate, potassium carbonate and ammonium carbonate.

Copper carbonate can be made by reacting together solutions of sodium carbonate and copper nitrate.
Complete this equation by filling in the missing state symbols.

sodium carbonate (aq) + copper nitrate (aq) → copper carbonate (_____ ) + sodium nitrate (_____ )

(c) The symbol for a copper ion is Cu²⁺.
The symbol for a carbonate ion is CO₃²⁻.
Write the formula for copper carbonate.

(d) In an experiment, solid lead iodide is produced in a mixture with a solution of a soluble salt.
Describe how a pure, dry sample of solid lead iodide can be obtained from this mixture.

(e) Two tests were carried out to identify the ions in salt X.
(i) Test: flame test on solid salt X.
Result: lilac flame.
Identify the ion in salt X that gives the lilac flame.

(ii) Test: addition of dilute nitric acid and silver nitrate solution to a solution of salt X.
Result: white solid formed.
Identify the ion in salt X that produces the white solid.

(Total for Question 3 = 9 marks)

3 (a) Solutions of soluble salts can react together to form an insoluble salt - Edexcel - GCSE Chemistry - Question 3 - 2014 - Paper 1

Worked Solution & Example Answer:3 (a) Solutions of soluble salts can react together to form an insoluble salt - Edexcel - GCSE Chemistry - Question 3 - 2014 - Paper 1

What name is given to this type of reaction?

sodium carbonate (aq) + copper nitrate (aq) → copper carbonate (_ ) + sodium nitrate (_ )

Write the formula for copper carbonate.

Describe how a pure, dry sample of solid lead iodide can be obtained from this mixture.

Identify the ion in salt X that gives the lilac flame.

Identify the ion in salt X that produces the white solid.

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