Hydrated cobalt(II) chloride, CoCl2⋅6H2O\text{CoCl}_2 \cdot 6\text{H}_2\text{O}CoCl2⋅6H2O, is a pink solid. Anhydrous cobalt(II) chloride, CoCl2\text{CoCl}_2CoCl2, is a blue solid. Heat energy is required to convert hydrated cobalt(II) chloride to anhydrous cobalt(II) chloride. This is a reversible reaction.
CoCl2⋅6H2O⇌CoCl2+6H2O \text{CoCl}_2 \cdot 6\text{H}_2\text{O} \rightleftharpoons \text{CoCl}_2 + 6\text{H}_2\text{O} CoCl2⋅6H2O⇌CoCl2+6H2ODevise an experiment to show that this is a reversible reaction.
Practise Edexcel GCSE Chemistry Reversible reactions and equilibria with exam-style questions for Foundation and Higher tier. 38 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.
