ExpertEasy1 markMultiple Choice
AQA GCSE · Question 01.1 · Chemical changes
This question is about copper sulfate. Blue copper sulfate turns white when it is heated. The word equation for the reaction is:
hydrated copper sulfate ⇌ anhydrous copper sulfate + water
(blue) (white)
What name is given to hydrated copper sulfate in this reaction? Select one option.
This question is about copper sulfate. Blue copper sulfate turns white when it is heated. The word equation for the reaction is:
hydrated copper sulfate ⇌ anhydrous copper sulfate + water
(blue) (white)
What name is given to hydrated copper sulfate in this reaction? Select one option.
Answer options:
A.
Catalyst
B.
Element
C.
Product
D.
Reactant
How to approach this question
Read the word equation. Identify the substances on the left side of the arrow. These are the starting materials. Recall the scientific term for the starting materials in a chemical reaction.
Full Answer
D.Reactant✓ Correct
Reactant
In a chemical reaction, the substances you start with are called reactants. The substances that are formed are called products. In the given equation, hydrated copper sulfate is on the left side of the arrow, meaning it is a starting substance, or a reactant. Anhydrous copper sulfate and water are on the right side, so they are the products.
Common mistakes
✗ Confusing reactant with product. Products are on the right side of the equation.
✗ Choosing catalyst. A catalyst is not consumed in the reaction, whereas the hydrated copper sulfate is.
Practice the full AQA GCSE Chemistry Foundation Tier Paper 2
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