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Two buffers (X) and (Y) of pH 4.0 and 6.0 respectively, are prepared from acid HA and the salt NaA. Both the buffers are 0.50 M in HA. When equal volumes of these two buffers are mixed, the pH of the solution obtained will be (Ka = 1 x 10-5)

(a) 7.8 

(b) 6.4

(c) 5.7 

(d) 3.9

1 Answer

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Best answer

Correct Option (c) 5.7 

Explanation:

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