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In the chemical reaction, Ag(2)O+H(2)...

In the chemical reaction,
`Ag_(2)O+H_(2)O+2e^(-) to 2Ag+2OH^(-)`

A

water is oxidised

B

electrons are reduced

C

silver is oxidised

D

silver is reduced

Text Solution

Verified by Experts

The correct Answer is:
D
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The zinc /silver oxide cell is used in hearing aids and electric watches . Zn to Zn^(2+) + 2 e^(-) E^(Theta) = -0.76 V Ag_(2) O + H_(2) O + 2e^(-) to 2 Ag +2 OH^(-) E^(Theta) = 0.344 V Which is oxidised and which is reduced ?

In the button cells widely used in watches and other devices the following reaction takes place: Zn(s) + Ag_(2)O(s) + H_(2)O (l) to Zn^(2+) (aq) + 2Ag(s) + 2OH^(-)(aq) Determine DeltaG^(@) and E^(@) for the reaction Zn(s) to Zn^(2+) + 2e^(-) , E^(@) = 0.76 V Ag_(2)O + H_(2)O + 2e^(-) to 2Ag + 2OH^(-) E^(@) = +0.34 V

Knowledge Check

  • In the reaction , Ag_(2)O+ H_(2)O_(2) to 2Ag + H_(2)O+ O_(2) H_(2)O_(2) acts as

    A
    reducing agent
    B
    oxidising agent
    C
    bleaching agent
    D
    none of these

  • In the reaction: Ag_(2)O + H_(2)O_(2) to 2Ag + H_(2)O +O_(2) H_(2)O_(2) act as:

    A
    Reducing agent
    B
    Oxidising agent
    C
    Bleaching agent
    D
    None of these

  • In the reaction: Ag_(2)O + H_(2)O_(2) to 2Ag + H_(2)O +O_(2) H_(2)O_(2) act as:

    A
    Reducing agent
    B
    Oxidising agent
    C
    Bleaching agent
    D
    None of these

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    The standard potential of the reaction H_(2)O + e^(-) to 1/2 H_(2)^(+) OH^(-) at 298 K is

    The standard potential of the reaction H_(2)O + e^(-) to 1/2 H_(2)^(+) OH^(-) at 298 K is

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    The zinc/silver oxide cell is used in electric current reaction is as following: Zn^(2+) + 2e^(-) to Zn, E^(@) = - 0.760 V Ag_(2)O + H_(2)O + 2e^(-) to 2Ag + 2OH, E^(@) = 0.344 V If F is 96,500 C mol^(-1) , DeltaG^(@) of the cell will be:

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