This question is about reversible reactions.
When 4.76 g of hydrated cobalt(II) chloride changes into anhydrous cobalt(II) chloride:
The equation for the reversible reaction is:
hydrated cobalt(II) chloride⇌anhydrous cobalt(II) chloride+water \text{hydrated cobalt(II) chloride} \rightleftharpoons \text{anhydrous cobalt(II) chloride} + \text{water} hydrated cobalt(II) chloride⇌anhydrous cobalt(II) chloride+waterCalculate the maximum mass of water that can be produced from 14.28 g of hydrated cobalt(II) chloride.
8.45 g of anhydrous cobalt(II) chloride completely changes into hydrated cobalt(II) chloride when water is added. Calculate the amount of energy transferred to the surroundings. Give your answer to 3 significant figures.
Practise AQA GCSE Chemistry Reversible reactions and dynamic equilibrium with exam-style questions for Foundation and Higher tier. 30 questions covering Reversible reactions, Energy changes and reversible reactions, Equilibrium, The effect of changing conditions on equilibrium (HT only), The effect of changing concentration (HT only), The effect of temperature changes on equilibrium (HT only), and The effect of pressure changes on equilibrium (HT only), matched to the AQA GCSE Chemistry (8462) 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.