Copper(II) sulphate solution is placed in four vessels A, B, C, D made of iron, zinc, silver
and aluminium. In which vessel the chemical reaction will not occur?
(a) A
(b) B
(c) C
(d) D.
Answers
C
Explanation:
because silver is less reactive than copper
The chemical reaction will not occur when copper(II) sulphate solution is placed in a silver vessel.
The reaction of copper sulphate with iron, zinc, silver, and aluminium is given below:
a. Reaction with iron
When copper(II) sulphate solution is placed in an iron vessel, the iron displaces copper, and iron sulphate is left in the vessel as,
Fe(s) + CuSO₄(aq.) → FeSO₄(aq) + Cu(s)
(iron) (copper II sulphate solution) (iron sulphate) (copper)
b. Reaction with zinc
When copper(II) sulphate solution is placed in a zinc vessel, zinc displaces copper, and zinc sulphate is left in the vessel as,
Zn(s) + CuSO₄(aq.) → ZnSO₄(aq) + Cu(s)
(Zinc) (copper II sulphate solution) (zinc sulphate) (copper)
b. Reaction with silver
No reaction occurs on placing copper sulphate solution in silver vessel.
Ag(s) + CuSO₄(aq) → No reaction
(silver) (copper sulphate solution)
d. Reaction with aluminium
When copper(II) sulphate solution is placed in aluminium vessel, the aluminium displaces copper, and aluminium sulphate is formed as,
Al(s) + CuSO₄(aq.) → Al₂(SO₄)₃ (aq) + Cu(s)(aluminium) (copper II sulphate solution) (aluminium sulphate) (copper)
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