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Electrochemical Cells, Galvanic Cells

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Question

What is the effect of Hg cathode on other ions (if any)? because in package it is given discharge potential of Na+ is less than H+ in presence of Hg cathode.

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Solution

Use of mercury electrode is specific.

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Similar questions

N a^{+}

ions are discharged in preference to

H^{+}

ions at Hg cathode. Reason: The nature of the cathode can affect the order of discharge of ions.

Read the above assertion and reason and choose the correct option regarding it.

Q. In electrolysis of

N a C l

P t

electrode is taken then

H_{2}

is liberated at cathode while with

H g

cathode it forms sodium amalgam because:

Q. Assertion :Sodium ions are discharged at a mercury cathode in preference to hydrogen ion. Reason:

N a^{+}

is stronger reducing agent than

H^{+}

.

If Na+ and H+ ion is present in an electrolytic solution the which one will migrate towards the cathode and get discharged?

Q. Assertion :Alkali metals are obtained by electrolysis of molten salt and not aqueous solution. Reason: The discharge potential of H ions is lower than alkali metal cation hence hydrogen is discharged at cathode instead of metal.

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