Chemistry
A …………… solution is observed after placing Magnesium metal in a solution of Copper sulphate for half an hour.
- Blue
- Colourless
- Reddish brown
- Dirty green
Chemical Reaction
ICSE Sp 2024
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Answer
Colourless
Reason — According to the reactivity series of metals, magnesium is more reactive compared to copper. Hence, it replaces copper from CuSO4 and the blue colour fades as colourless magnesium sulphate is formed and brown bits of copper metal form a precipitate:
Mg + CuSO4 ⟶ MgSO4 + Cu
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