Home
Class 11
CHEMISTRY
What is the concentration of CN^(-) ion...

What is the concentration of `CN^(-) ` ions in a solution with 0.1 M HCl and 0.01 M HCN where `K_a` of HCN is `10 ^(-6) ` ?

A

`[H^(+) ]_("total") ~~[H^(+) ]` from first step ionization of acid `H_2A `

B

Concentration of `OH^(-) ` in solution is `10 ^(-3) ` M

C

The value of `K_(a_1) ` is nearly `10 ^(5)`

D

` p^(ka_2) - p^(ka_1) =9`

Text Solution

Verified by Experts

The correct Answer is:
A, C
` [H^(+) ]=sqrt(K_(a_1) xx C ) rArr 10^(-3) =sqrt( K_(a_1)xx 10^(-1)) `
` K_(a_1) =10 ^(-5) rArr [A^(-2) ]=K_(a_2) rArr P^(K_(a2 )) = 12 `
` P^(K_(a2)) -P^(K_(a3)) = 7 `
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -II PRACTICE SHEET (ADVANCED) (Linked Comprehension Type Questions))|4 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -II PRACTICE SHEET (ADVANCED) (Integer Type Questions))|8 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -II PRACTICE SHEET (ADVANCED) (Straight Objective Type Questions))|18 Videos

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|20 Videos

  • ISOMERISM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE ( PRACTICE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|10 Videos

Similar Questions

Explore conceptually related problems

Calculate the concentrations of dichloroacetate and proton in a solution that is 0.01 M HCl and 0.01 M in CHCI_2 COOH. K_a for CHCI_2 COOH is 5 xx 10^(-2)

What is the maximum concentration of Mg^(+2) that can be introduced into a solution containing 0.1 M NH_3 and 0.01 M NH_4^(+ ) without causing precipitation of Mg (OH)_2 ? K_b of NH_3 = 10^(6) K_(sp) of Mg(OH)_2 =1.2 xx 10^(-12)

What is the [CN^(-)] in a solution prepared by mixing 100ml 0.1IM KCN and 100ml 0.2M HCI? (K_(x) " of " HCN = 5 xx 10^(-6) )

The weak acids undergo partial ionisation is aqueous medium. However the dissociation of weak acids is suppressed by presence of common ions. But the Ka value of the acid remains constant irrespective of extent of dissociation What is [CN^(-)] J in a solution prepared by mixing 100ml 0.1M KCN and 100 ml 0.1 M HCl ? (K_(a) of HCN= 5xx 10^(-6) )

The p^(H) of 0.1 M NaCI solution is

P^(H) of a solution of the mixture of 0.1 HCl and 0.1N CH_3 COOH is ( K_a =2xx10 ^(-5))

100 ml of 0.1 M HCl and 100 ml of 0.1 M HOCN are mixed then (K_a= 1.2 xx 10^(-6))