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5.1 Obtaining and using metals

5.1 Obtaining and using metals

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Question 1

Titanium is extracted from titanium(IV) chloride in a batch process at high temperature:

TiCl4(g)+2Mg(l)→Ti(s)+2MgCl2(l) \text{TiCl}_4(\text{g}) + 2\text{Mg}(\text{l}) \rightarrow \text{Ti}(\text{s}) + 2\text{MgCl}_2(\text{l}) TiCl4​(g)+2Mg(l)→Ti(s)+2MgCl2​(l)

Which statement correctly describes a chemical or practical aspect of this extraction process?

A

Magnesium acts as the reducing agent because its oxidation state increases from 000 to +2+2+2.

B

Titanium(IV) chloride is oxidised because titanium gains electrons to form titanium metal.

C

Chloride ions act as the oxidising agent because they are reduced during the process.

D

An atmosphere of nitrogen gas is used to prevent the hot magnesium and titanium from reacting with oxygen in the air.

Markscheme

5.1 Obtaining and using metals Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Obtaining and using metals

110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.

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