Exam code: 0653
Iron(II) ions, Fe2+, are formed from atoms of iron, Fe.
(i) Describe how Fe2+ ions are formed from iron atoms.
[1]
(ii) Describe what is observed when aqueous sodium hydroxide is added to aqueous iron(II) ions.
[2]
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You are going to investigate the reaction between metal F and dilute sulfuric acid.
(a) Procedure:
Add 3 cm depth of dilute sulfuric acid to a clean test-tube.
Add a spatula of metal F to the test-tube.
Test the gas produced in the reaction to identify it.
(i) State the test used to identify the gas and give the observation for a positive result.
[1]
(ii) State the name of the gas.
[1]
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A student investigates the reaction between metal F and dilute sulfuric acid.
(i) Procedure
The student:
adds 3 cm depth of dilute sulfuric acid to a test-tube
adds a spatula of metal F to the test-tube
observes the mixture fizzing slowly
tests the gas produced with a lighted splint
hears a squeaky pop.
Identify the gas produced.
[1]
(ii) The student repeats the procedure from (a)(i) but also adds aqueous copper(II) sulfate to the dilute sulfuric acid and metal F.
The student observes that this reaction is faster than the reaction in (a)(i).
Suggest one observation the student makes which shows that this reaction is faster.
[1]
(iii)
Procedure
The student:
pours a small volume of the aqueous product from the procedure in (a)(i) into a test‑tube
adds aqueous sodium hydroxide
observes a white precipitate.
Use this observation to suggest two possible identities for the cation produced from metal F.
[1]
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