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?
Magnesium acts as the reducing agent because its oxidation state increases from 000 to +2+2+2.
Titanium(IV) chloride is oxidised because titanium gains electrons to form titanium metal.
Chloride ions act as the oxidising agent because they are reduced during the process.
An atmosphere of nitrogen gas is used to prevent the hot magnesium and titanium from reacting with oxygen in the air.
Practise Edexcel GCSE Chemistry Obtaining and using metals with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.