Home
Class 11
CHEMISTRY
A solution of 0.01 MCd^(2+) contains 0....

A solution of 0.01 `MCd^(2+) ` contains `0.01M NH_4OH.` What conc. Of `NH_4^(+) ` from `NH_4Cl` is necessary to prevent precipitation of `Cd( OH)_2? K_(sp) " of " (OH)_2 =2.0 xx 10^(-14) ,K_b " of " NH_4 OH = 1.8 xx 10^(-5) ` if answer is `1.272 xx 10^(-x) ` mol/litre then x=________?

Text Solution

Verified by Experts

The correct Answer is:
1
` K_(sp) =[Cd^(+2) ][OH^(-) ] ^(2) , 2 xx 10 ^(-14) =10 ^(-2) [OH^(-) ]^(2) `
` [OH^(-) ] =1.414 xx 10 ^(-6) rArr K_b =([NH_4^(+) ][OH^(-) ])/( [NH_4OH]) `
` 1.8 xx 10 ^(-5) =([ NH_4^(+) ][1.4 xx 10 ^(-6)])/( 10^(-2))`
` [NH_4^(+) ]=1.2 xx 10 ^(-1) `
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -I (MAIN) (Straight Objective Type Questions))|22 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -II LECTURE SHEET (ADVANCED) (Straight Objective Type Questions))|24 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -IV LEVEL -I (ADVANCED) (Matrix Matching Type Questions))|2 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

The P^(H) of an aqueous solution of NH_4 CN( K_a of HCN is 9.2 xx 10^(-10) & K_b of NH_4 OH is 1.8 xx 10^(-5))

The maximum pH of a solution which is 0.10 M in Mg ^(2+ ) from which Mg (OH) _ 2 is not precipitated is : ( Given K_(sp) " of " Mg (OH)_2 =1.2 xx 10^(-11) M)

What can be permitted concentration of Ag^(+) ions in 0.1 M HCN solution buffered at pH =3 without causing precipitation of AgCN. K_(sp) " of " AgCN =1.2 xx 10 ^(-16) ,K_a " of " HCN = 4.8 xx 10^(-10 )

Calculate the ratio of solubility of AgCl " at " 25 ^(@) C in 3.0 M NH_3 (K_(sp) of AgCl in NH_3 " is " 3.1 xx 10^(-3) ) and " in " H_2O (K_(sp) of AgCl in H_2O " is" 1.8 xx 10^(-10)) . If answer is 1.15 xx 10 ^(x) then x=________?

Calculate the solubility of CaF_(2) in water at 298 K which is 70% dissociated. K_(sp) of CaF_(2) is 1.7 xx 10^(-10) . If answer is x xx 10^(-4) mol/ltr then x = ____?

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)

Solution of 0.1 N NH_4 OH and 0.1 N NH_4 Cl "has " P^(H) 9.25 . Then P^(K_b) of NH_4 OH is