An aqueous solution would be:
a. acidic if it had a pOH 3.7
b. basic if it had a pH of 5.1
c. basic if it had a [OH-(aq)] of 1x 10^-2 mol/L
d. acidic if it had a [H3O+(aq)] of 1x 10^-9 mol/L
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Answer:
Option (c) is the right answer
All other options are wrong.
Explanation:
pOH = -log [OH-]
= - log 10^-2
pOH = 2
pH = 14 - pOH
= 14 - 2
pH = 12 (basic).
About option (d)
pH = -log [H+]
= -log [10^-9]
pH = 9 (basic)
The option states that the Soln would be acidic, Hence it’s a wrong option.
Option (a) and (b) are clearly wrong as we know Solns above pH = 7 are basic and those below are acidic.
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