Question

One litre of a buffer solution containing 0.01 m nh4cℓ and 0.1 m nh4oh having pkb of 5 has ph of -

Answer 1

Answer:- pH = 10

Solution:- The pH of the buffer is calculated using Handerson equation:

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

For the given buffer, the acid is ammonium chloride with concentration 0.01 M and the base is ammonium hydroxide with the concentration 0.1 M.

pKa is calculated from the given pKb as:

pKa = 14 - pKb

pKa = 14 - 5 = 9

Let's plug in the values in the equation:

$pH=9+log(\frac{0.1}{0.01})$

$pH=9+log10$

pH = 9 + 1

pH = 10

So, the pH of the given buffer solution is 10.

Answer 2

Answer:

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