Home
Class 11
CHEMISTRY
The hydrogen ion concentration in weak a...

The hydrogen ion concentration in weak acid of dissociation constant `K_(a)` and concentration `c` is nearly equal to

A

`sqrt(K_(a)//c)`

B

`c//K_(a)`

C

`K_(a)c`

D

`sqrt(K_(a)c)`

Text Solution

Verified by Experts

The correct Answer is:
D
`{:(HA,hArr,H^(+),+,A^(-)),(C(1-alpha),,Calpha,,Calpha):}`
Hydrogen ion concentration `[H^(+)] =Calpha " " …..(i)`
By the ostwald.s law `alpha =sqrt((K_(a))/C)" "...(ii)`
By putting this value in equation (i) we get
`rArr C xx sqrt((K_(a))/C) = sqrt(K_(a)C)`.
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    ERRORLESS|Exercise NCERT BASED QUESTIONS (ACIDS AND BASES)|78 Videos

  • IONIC EQUILIBRIUM

    ERRORLESS|Exercise NCERT BASED QUESTIONS (COMMON ION EFFECT, ISOHYDRIC SOLUTIONS, SOLUBILITY PRODUCT, IONIC PRODUCT OF WATER AND SALT HYDROLYSIS)|59 Videos

  • HYDROGEN

    ERRORLESS|Exercise ASSERTION & REASON|6 Videos

  • PURIFICATION, CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    ERRORLESS|Exercise ASSERTION & REASON|9 Videos

Similar Questions

Explore conceptually related problems

The hydrogen ion concentration of a liquid is equal to its hydroxide ion concentration . The liquid is

Consider a solution of monoprotic weak acid having dissociation constant K_(a) . What is the minimum concentration C in terms of K_(a) , such that the concentration of the undissociated acid that the concentration of the undissociated acid can be equated to C within a 10% limit of error ? Assume that activity coefficient correction are negligible.

Consider a solution of monoprotic weak acid having dissociation constant K_(a) . What is the minimum value of concentration of the undissociated acid can be equated to C within a 10% limit of error. Assume that activity coefficient corrections are negligible.

The hydrogen ion concentration of a 0.006 M benzoic acid solution is (K_(a) = 6 xx 10^(-5))

A solution of a weak monoprotic acid has dissociation constant K_(a) . The minimum initial concentration C such that the concentration of the undissociated acid can be equated to C within an error of 1% would be

Determine the hydrogen ion concentration in 1.0 M solution of HCN , if its dissociation constant is 4.0 xx 10^(-10) .

In vinegar the concentration of acetic acid is nearly