1 M N H 4 O H and 1 M H C l are mixed to make a total volume of 300 mL . If pH of the mixture is 9.26 and p K a N H 4 + = 9.26 then what would be the volume ratio of N H 4 O H and H C l .

Question

1 M N H 4 O H and 1 M H C l are mixed to make a total volume of 300 mL . If pH of the mixture is 9.26 and p K a N H 4 + = 9.26 then what would be the volume ratio of N H 4 O H and H C l ., 2:1, 1:2, 2:3, 3:2

MARKS App · Accepted Answer

p O H = 14 - p H = p K b + log ⁡ x 300 - 2 x = 14 - 9.26 = - log ⁡ 10 - 4.74 + log ⁡ x 300 - 2 x ⇒ x 300 - 2 x = 1 ⇒ 300 = 3 x ⇒ x = 100 m L V NH 4 OH V HCl = 2

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