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Electrochemical Cells, Galvanic Cells

What is the e...

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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