The formula of the chromium(III) ion is Cr3+\text{Cr}^{3+}Cr3+. The formula of the sulfate ion is SO42−\text{SO}_4^{2-}SO42−.
Which is the formula of chromium(III) sulfate?
Cr3(SO4)2\text{Cr}_3(\text{SO}_4)_2Cr3(SO4)2
Cr2SO12\text{Cr}_2\text{SO}_{12}Cr2SO12
Cr2(SO4)3\text{Cr}_2(\text{SO}_4)_3Cr2(SO4)3
Cr2S3O12\text{Cr}_2\text{S}_3\text{O}_{12}Cr2S3O12
Practise Edexcel GCSE Chemistry Ionic bonding with exam-style questions for Foundation and Higher tier. 32 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.
