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5.1 Obtaining and using metals

5.1 Obtaining and using metals

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Question 3

In the industrial extraction of titanium, titanium tetrachloride (TiCl4\text{TiCl}_4TiCl4​) is reduced using molten magnesium at high temperatures.

The overall reaction is represented by:

TiCl4+2Mg→Ti+2MgCl2 \text{TiCl}_4 + 2\text{Mg} \rightarrow \text{Ti} + 2\text{MgCl}_2 TiCl4​+2Mg→Ti+2MgCl2​

This can be written as the simplified ionic equation:

Ti4++2Mg→Ti+2Mg2+ \text{Ti}^{4+} + 2\text{Mg} \rightarrow \text{Ti} + 2\text{Mg}^{2+} Ti4++2Mg→Ti+2Mg2+

Explain, in terms of electrons, why this extraction process is classified as a redox reaction.

[3]
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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