Ionic EquilibriumHard
Question
10 mL of 10-6 M HCI solution is mixed with 90 mL H2O. pH will change approximately:
Options
A.By one unit
B.By 0.3 unit
C.By 0.7 unit
D.By 0.1 unit
Solution
pH of 10-6 M HCI = 6; on dilution [HCI] =
= 10-7
Thus new pH of HCI is not 7 because it is acid. For new solution pH:
[H+] = 10-7 + 10-7 (from H2O) = 2 × 10-7 ∴ pH = 6.7
(approximately)
= 10-7 Thus new pH of HCI is not 7 because it is acid. For new solution pH:
[H+] = 10-7 + 10-7 (from H2O) = 2 × 10-7 ∴ pH = 6.7
(approximately)
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