A student heats 1.12 g of iron wool in a stream of chlorine gas in a fume cupboard. The iron reacts to form a brown solid, iron chloride. The mass of iron chloride formed is 3.25 g.
Relative atomic masses: Fe = 56, Cl = 35.5, S = 32, O = 16
Calculate the mass of chlorine that reacted with the iron.
Determine the empirical formula of the iron chloride. Show your working.
Deduce the formula of the iron ion in this compound.
This iron ion also forms a sulfate. Give the formula of this iron sulfate.
Calculate the percentage by mass of iron in this iron sulfate.
56 exam-style questions on Edexcel GCSE Chemistry 2.3 Ionic bonding, covering 2.3.1 Ions and the formation of ionic bonds, 2.3.2 Naming and deducing formulae of ionic compounds, and 2.3.3 Giant ionic lattices. Each one has a worked solution and a mark scheme showing where the marks go.