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Which of the following is the ph of a solution in which concentration of hydrogen ion is greater than hydroxide ion. 0ptions:12,9,7 or 3

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Why are you having trouble with this?
pH = -log(H^+)
Plug in pH, solve for H and use that and the last equation to solve for OH, then compare.
(H^+)(OH^-) = Kw = 1E-14.

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