ExpertEasy1 markMultiple Choice
AQA GCSE · Question 01.6 · Quantitative chemistry
What is the chemical formula for Copper sulfate?
What is the chemical formula for Copper sulfate?
Answer options:
A.
CuO
B.
CuS
C.
CuSO₄
D.
H₂O
E.
H₂SO₄
How to approach this question
Recall the chemical symbol for copper and the chemical formula for the sulfate ion. Combine them to form the correct formula for copper sulfate.
Full Answer
C.CuSO₄✓ Correct
CuSO₄
The name "Copper sulfate" indicates it contains copper and a sulfate ion. The chemical symbol for copper is Cu. The chemical formula for the sulfate ion is SO₄²⁻. The copper ion in this compound has a 2+ charge (Cu²⁺) to balance the 2- charge of the sulfate ion. Therefore, the correct formula is CuSO₄.
Common mistakes
✗ Confusing sulfate (SO₄) with sulfide (S) or oxide (O).
✗ Choosing a formula for a different compound like water or sulfuric acid.
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