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Ways of Representing the Concentration of a Solution

Addition of i...

Question

Addition of iron or zinc to copper sulphate results in precipitation of copper owing to

A

Reduction of Cu⁺⁺

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B

Oxidation of Cu⁺⁺

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C

Hydrolysis of CuSO₄

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D

Ionization of CuSO₄

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Solution

The correct option is A
Reduction of Cu⁺⁺

In this process zinc or iron replaces copper from copper sulphate and Cu⁺⁺ is reduced to Cu.

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Q. Addition of iron or zinc to copper sulfate causes precipitation of copper owing to the_______

Q. When iron fillings are added to copper sulphate solution

C u

is precipitated because of:

Q. The reaction

Z n + C u S O_{4} = C u + Z n S O_{4}

goes completely to the right. In one experiment

10 g

of metallic zinc was added to

200 m L

of copper sulphate solution.

Q. Assertion: Starting from aq. copper [II] sulphate solution, equations for the reactions at the cathode and anode during electrolysis of aq.

C u S O_{4}

using active copper electrodes is;
at anode:

C u^{+ 2} + 2 e^{-} \to C u

C u \to C u^{+ 2} + 2 e^{-}

Reason: Oxidation always take place at anode and reduction at cathode.

Q. The emf of the cell

C u | C u S O_{4} a = 0.1 | | C u S O_{4} x | C u

- 0.03 V

25^{\circ} C

. Calculate the activity of copper sulphate solution in the right hand side electrode.

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