(Answered) How many moles of oh- are required to raise the ph of 400

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How many moles of OH- are required to raise the pH of 4.00 liters of 25 mM glycine, pH 1.90, to a final pH of 9.70? Assume that the addition of OH- does not change the volume of the solution. The pKa's of glycine are α-COOH group 2.34 and α-NH3+ group 9.60.

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