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The first and second dissociation consta...

The first and second dissociation constants of an acid `H_(2)A` are `1 xx 10^(-5)` and `5 xx 10^(-10)` respectively. The overall dissociation constant of the acid will be

A

`4xx10^(-15)`

B

`5xx10^(-15)`

C

`0.2xx10^(-5)`

D

`5xx10^(-5)`

Text Solution

Verified by Experts

The correct Answer is:
B
`K=K_(1)xxK_(2)`
`k=1xx10^(-5)xx5xx10^(-10)=54xx0^(-15)`
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Knowledge Check

  • The first and second dissociation constants of an acid H_(2)A are 1.0 xx 10^(-5) and 5.0 xx 10^(-10) respectively. The overall dissociation constant of the acid will be

    A
    `5.0 xx 10^(-5)`
    B
    `5.0 xx 10^(15)`
    C
    `5.0 xx 10^(-15)`
    D
    `0.0 xx 10^(-5)`

  • The first and second dissociation constants of an acid H_2A are 1.0 xx 10^(-5) and 5.0 xx 10^(-10) respectively. The overall dissociation constant of the acid will be

    A
    `0.2 xx 10^(5)`
    B
    `5.0 xx 10^(-5)`
    C
    `5.0 xx 10^(15)`
    D
    `5.0 xx 10^(-15)`

  • The first and second dissociation constants of an acid H_(2)A are 1.0xx10^(-5) and 5.0xx10^(-10) respectively. The overall dissociation constant of the acid will be

    A
    `0.2xx10^(5)`
    B
    `5.0xx10^(-5)`
    C
    `5.0xx10^(15)`
    D
    `5.0xx10^(-15)`