When iron reacts with chlorine, iron chloride is formed.
Two possible equations for this reaction are:
A 2Fe+3Cl2→2FeCl32\text{Fe} + 3\text{Cl}_2 \rightarrow 2\text{FeCl}_32Fe+3Cl2→2FeCl3 B Fe+Cl2→FeCl2\text{Fe} + \text{Cl}_2 \rightarrow \text{FeCl}_2Fe+Cl2→FeCl2
In an experiment, 11.20 g of iron reacts completely with chlorine to form 32.50 g of iron chloride.
Show, using a calculation, which reaction, A or B, is taking place.
You must show your working.
(Relative atomic masses, ArA_rAr: Cl=35.5\text{Cl} = 35.5Cl=35.5; Fe=56.0\text{Fe} = 56.0Fe=56.0)
258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.