Question 5(f)(ii)
[Maximum number: 1]
A student uses this apparatus to investigate the effect of heat on different solid metal carbonates.
This is the student's method.
- use a spatula to put some metal carbonate in the boiling tube
- fit the delivery tube into position
- pour some limewater into the test tube
- start a timer and immediately begin to heat the metal carbonate
- record the time when a change first occurs in the limewater
The student repeats the method using different metal carbonates.
When a metal carbonate is heated a reaction sometimes occurs.
The equation for the reaction is
metal carbonate → metal oxide + carbon dioxide
State how you should extend the investigation to see if your deduction is correct.