31. The pH of four different solutions was determin then small amounts of strong

Question

31. The pH of four different solutions was determin then small amounts of strong consecutively to equal volumes of each pH after adding Solution initial pH first addition second 5.1 6.2 6.2 6,0 From these measurements, we can conclude that b any acid was added (A) solutions 1 and 3 are buffers but solution 3 has greater buffer capacity than 1. (B) solutions 2 and 4 are buffers but solution 2 has greater buffer capacity than 4, (C) solutions 3 and 4 are buffers but solution 4 has greater buffer capacity than 3 D) none of the four initial solutions is a buffer,

Explanation / Answer

Ans

Buffer solution- the solution in which on addition small amount of a strong acid and strong base the pH is not altered by any great extend is called buffer solution

In solution 2 and 3 pH is not change on addition strong acid by any great extend so both are buffer solution

- solution 2nd has more buffer capacity because change in pH is small

Answer-(B)

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