This question is about a reaction of copper sulfate.
When blue hydrated copper sulfate is heated, it turns into white anhydrous copper sulfate. Water is given off.
hydrated copper sulfate ⇌ \rightleftharpoons\,⇌ anhydrous copper sulfate + water
What does the symbol ⇌ \rightleftharpoons\,⇌ tell you about this reaction?
Complete the sentences about the reaction.
Use words from the list: blue, cooling, oxygen, water, white
When hydrated copper sulfate is heated, its colour changes from blue to ...... . When ...... is added to the cold anhydrous copper sulfate, the colour changes back to ...... .
When water is added to anhydrous copper sulfate, the test tube gets hot.
Is the reaction of anhydrous copper sulfate with water exothermic or endothermic?
Give a reason for your answer.
A student heats 2.50 g of hydrated copper sulfate until its mass stops changing.
The mass of anhydrous copper sulfate left is 1.60 g.
Calculate the mass of water given off.
Mass of water = ...... g
The student lets the anhydrous copper sulfate cool. The student then adds the same mass of water that was given off in (d).
Predict the mass of hydrated copper sulfate that forms. Give a reason for your answer.
Mass of hydrated copper sulfate = ...... g
47 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.