Identifying the products of chemical reactions

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Question 16
Medium

A teacher investigates the reactions of copper carbonate, CuCO3\text{CuCO}_3CuCO3​.

The diagram shows the reactions the teacher does.

![A flowchart showing the chemical reactions of copper carbonate:

  • 'Copper carbonate, CuCO3\text{CuCO}_3CuCO3​' has a downward arrow labeled 'Add dilute sulfuric acid' pointing to three products connected by plus signs: 'Solution of a blue soluble salt, X', 'Water', and 'Gas Y'.
  • From 'Solution of a blue soluble salt, X', a downward arrow labeled 'Electrolysis' points to two products: 'Copper' and 'Gas Z'.
  • From 'Copper', a downward arrow labeled 'Flame test' points downwards.](https://assets.mathsgenie.co.uk/aqa-qb/882bd2fb-a8cf-4e82-8766-8a8579721a47.png)
a.

State the name of the soluble salt, X.

[1]
b.

State the name of gas Y.

[1]
c.

Gas Z relights a glowing splint. State the name of gas Z.

[1]
d.

The teacher performs a flame test of the copper metal. What colour flame does the teacher observe?

[1]
e.

Lead metal is extracted from lead(II) oxide by heating with carbon as shown in the word equation:

lead oxide+carbon→lead+carbon dioxide\text{lead oxide} + \text{carbon} \rightarrow \text{lead} + \text{carbon dioxide}lead oxide+carbon→lead+carbon dioxide

Explain why lead is extracted. Use ideas about the reactivity series.

[2]
f.

Metals are often mixed with other elements to make alloys. The table gives information about some common alloys.

AlloyMain elementsUses
solderlead and ........................joining electrical components
stainless steeliron, chromium and ........................cutlery
mild steeliron and carbon........................

Complete the table.

[3]

Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Identifying the products of chemical reactions