Question 2 calculate the ph of a solution that has an acetic acid concentration of 0.05 m and a sodium acetate concentration of 0.075 m. (a) by making use of the henderson - hasselbach equation. (b) without making any assumptions. (4) (6) 1101

Answer : The pH of the solution is, 4.9

Explanation : Given,

Dissociation constant for acetic acid =

Concentration of acetic acid = 0.05 M

Concentration of sodium acetate = 0.075 M

First we have to calculate the value of .

The expression used for the calculation of is,

Now put the value of in this expression, we get:

Now we have to calculate the pH of buffer.

Using Henderson Hesselbach equation :

Now put all the given values in this expression, we get:

Therefore, the pH of the solution is 4.9.

its weight is greatest on earth

the answer would be a