Chemistry Class 11 NCERT Solutions: Chapter 7 Equilibrium Part 20

Chemistry Class 11 NCERT Solutions Chapter 7 Equilibrium Part 20

Q: 54. The ionization constant of dimethylamine is Equation Calculate its degree of ionization in its 0.02 M solution. What percentage of dimethylamine is ionized if the solution is also Equation ?

Answer:

Equation

Equation

Then, Equation

Equation

Equation

Now, if 0.1 M of Equation is added to the solution, then Equation (being a strong base) undergoes complete ionization.

Equation

And,

Equation

Then, Equation

Equation

Equation

Equation

Equation

It means that in the presence of 0.1 M Equation 0.54% of dimethylamine will get dissociated.

Q: 55. Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:

(A) Human muscle-fluid, 6.83

(B) Human stomach fluid, 1.2

(C) Human blood, 7.38

(D) Human saliva, 6.4

Answer:

(A) Human muscle-fluid, 6.83

Equation

Equation

Equation

(B) Human stomach fluid, 1.2

Equation

Equation

Equation

(C) Human blood, 7.38

Equation

Equation

(D) Human saliva, 6.4

Equation

Equation

Equation

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