If pink crystals of cobalt(II) chloride are heated, water vapour is released and the solid turns blue. $\text{CoCl}_2\cdot6\text{H}_2\text{O} \rightleftharpoons \text{CoCl}_2 + 6\text{H}_2\text{O}$ What occurs when water is added to the blue solid?
- Acolour changes to pink, temperature decreases
- Bcolour changes to pink, temperature increases
- Cremains blue, temperature decreases
- Dremains blue, temperature increases