Home
Class 12
CHEMISTRY
Ionisation constant of CH(3)COOH is 1.7 ...

Ionisation constant of `CH_(3)COOH` is `1.7 xx 10^(-5)` and concentration fo `H^(+)` in certain acetic acid solution is `3.4 xx 10^(-4) M` . The concentration of acetic acid solution is

A

`3.4 xx 10^(-4)M`

B

`3.4 xx 10^(-3)M`

C

``6.8 xx 10^(-4)M`

D

`6.8 xx 10^(-3)M`

Text Solution

Verified by Experts

The correct Answer is:
D
For a weak monobasric acid
`K_(a)=Calpha^(2)`
`K_(a)=C alpha.alpha=[H^(+)]alpha`
`alpha=(K_(a))/([H^(+)])`
`=(1.7 xx 10^(-4))/(3.4 xx 10^(-4)) =5 xx 10^(-2)`
`C alpha =[H^(+)]=3.4 xx10^(-4)`
`C=(3.4 xx 10^(-4))/(alpha)`
`=6.8 xx 10^(-3) M`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise SELECTED STRAIGHT OBJECTIVE TYPE MCQs|10 Videos

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise MCQs with only one correct Answer|29 Videos

  • IONIC EQUILIBRIUM

    DINESH PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS|60 Videos

  • HYDROCARBONS

    DINESH PUBLICATION|Exercise All Questions|493 Videos

  • NO IDEA

    DINESH PUBLICATION|Exercise Unit Test -|1 Videos

Similar Questions

Explore conceptually related problems

The OH^(-) ion concentration of solution is 3 xx 10^(-4) M . Find out the H^(+) ion concentration of the same solution?

The ionization constant of acetic acid 1.74xx10^(-5) . Calculate the degree of dissociation of acetic acid in its 0.05 M solution. Calculate the concentration of acetate ion in the solution and its pH .

Knowledge Check

  • Ionisation constant of CH_(3)CO O H is 1.7xx10^(-5) and concentration of H^(+) ions is 3.4 xx 10^(-4) . Then initial concentration of CH_(3) C O O H molecules is

    A
    `3.4xx10^(-4)`
    B
    `3.4xx10^(-3)`
    C
    `6.8xx10^(-3)`
    D
    `1.7xx10^(-3)`

  • Ionisation constant of CH_(3)COOH is 1.7xx10^(-5) and concentration of H^(+)ions is 3.4xx10^(-4) . Then, find out initial concentration of CH_(3)COOH molecules.

    A
    `3.4xx10^(-4)`
    B
    `3.4xx10^(-3)`
    C
    `6.8xx10^(-4)`
    D
    `6.8xx10^(-3)`

  • Ionisation constant of CH_3COOH is 1.7xx10^(-5) and [H^+] is 3.4xx10^(-4) . Then, initial concentration of molecules is

    A
    `6.8xx10^(-3) M`
    B
    `2.5xx10^(-4) M`
    C
    `3.5xx10^(-3) M`
    D
    `4.5xx10^(-3) M`

    • Similar Questions

    Explore conceptually related problems

    The ionization constant of acetic acid is 1.74xx10^(-5) . Calculate the degree of dissociation of acetic acid in its 0.05 M solution. Calculate the concentration of acetate ions in the solution and its pH .

    The dissociation constant for an acid HA is 1.6 xx 10^(-5) . Calculate its H_(3)O^(+) in concentration in 0.01 M solution .

    The acid dissociation constant K_(a) of acetic acid is 1.74 xx 10^(-5) at 298 K. The pH of a solution of 0.1 M acetic acid is

    If the ionisation constant of acetic acid is 1.8 xx 10^(-5) , at what concentration will it be dissociated to 2% ?

    The dissociation constant of weak acid HA is 1 xx 10^(-5) . Its concentration is 0.1 M . pH of that solution is

    Home
    Profile