Question

Solution of 0.1 n nh4oh and 0.1 n nh4cl has ph 9.25. Then find out pkb of nh4oh

Answer 1

Answer:- pKb = 4.75

Solution:- A mixture of solutions of ammonium hydroxide and ammonium chloride acts as a buffer solution and for the buffer solution Handerson equation is useful to find out the pH. The equation is:

$pH=pKa+log(\frac{base}{acid})$

Let's plug in the values in the equation:

$9.25=pKa+log(\frac{0.1}{0.1})$

9.25 = pKa

We know that, pKa + pKb = 14

So, pKb = 14 - pKa

pKb = 14 - 9.25

pKb = 4.75

So, pKb of $NH_4OH$ is 4.75.

Answer 2

Answer:

4.75 is your required answer

Explanation:

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