Answer to Question #192135 in General Chemistry for Zubayer

Question #192135

1. A one-liter buffer solution was made of ammonia (0.33 M)-

ammonium chloride (0.33 M) at equilibrium. A student was asked

to add 0.05 mol HCl to that solution. However, he mistakenly

added 0.07 mol NaOH to that solution. Assume no change in the

volume of the buffer.

(a) What type of buffer solution it was. Provide its mechanism.

(b) Calculate the change of pH of the buffer after the mistake of the


(c) What would be the change of pH if the student adds 1000 mL

water to that buffer solution?

Expert's answer


a)type of buffer solution it was and its mechanism.

Buffer Action of Single Salt Solution is -

The property of the solution to resist the changes in its pH value on the addition of small amounts of strong acid or base is known as buffer action.

b) The change of pH of the buffer is = 0.009

c) The change of pH is = 0.04

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