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Find [OH-] concentration of a 4.25x10^-4 M solution of HOCH2CH2NH2, kb = 3.1 x 10^-5. My...

Find [OH-] concentration of a 4.25x10^-4 M solution of HOCH2CH2NH2, kb = 3.1 x 10^-5.

My x value is coming out to 2.35..? Ans: 1.0 x 10^-4

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