Identifying the products of chemical reactions

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Question 19
Medium

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

The diagram shows the reactions the teacher does.

A flowchart showing reactions of copper carbonate. At the top, a box labeled "Copper carbonate, CuCO3" has an arrow pointing downwards with the label "Add dilute hydrochloric acid". This arrow leads to three boxes arranged horizontally: "Solution of blue-green salt X", "+ Water", and "+ Gas Y". From "Solution of blue-green salt X", a downward arrow labeled "Electrolysis" leads to two boxes: "Copper" and "+ Gas Z". From "Copper", a downward arrow points to "Flame test".

a.

State the name of the soluble salt, X.

[1]
b.

State the name of gas Y.

[1]
c.

Gas Z bleaches damp litmus paper. State the name of gas Z.

[1]
d.

The teacher performs a flame test of the copper made by the electrolysis of X. What colour flame does the teacher observe?

[1]
e.

Lead metal is extracted from lead oxide by heating with carbon as shown in the 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 can be extracted this way. Use ideas about the reactivity series.

[1]
f.

Complete the table below by identifying the missing metals or uses.

AlloyMain metalsUses
high carbon steeliron and .........................cutting tools
stainless steeliron, chromium, and .........................cutlery
brasscopper and zinc.........................
[3]

Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
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