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Electrolysis and Electrolytes

State the obs...

Question

State the observations at the anode and at the cathode during the electrolysis of:
Fused lead bromide using graphite electrodes.

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Solution

Electrolysis of fused lead bromide using graphite electrodes:
At anode, dark reddish brown fumes of bromine are obtained.
$2 B r^{-} \to B r_{2} + 2 e^{-}$
At cathode, greyish white lead metal is deposited.
$P b^{2 +} + 2 e^{-} \to P b$

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Q. State the observations at the anode and at the cathode during the electrolysis of:
Copper sulphate solution using copper electrodes.

(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.

(b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason.

(c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.

Q. State one relevant observation for the following.
At the anode, when molten lead bromide is electrolysed using graphite electrodes.

Q. Give appropriate scientific reasons for the following statements:

During electrolysis of molten lead bromide graphite anode is preferred to other electrodes.

S n C l_{2}

was electrolysed using inert electrodes. 0.119g Sn was deposited at cathode. If nothing was given out during electrolysis, calculate the ratio of mass of

S n C l_{2}

S n C l_{4}

in fused state after electrolysis is:

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