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8 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the concentration of the base?

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H3PO4 + 3KOH ==> K3PO4 + 3H2O

mols H3PO4 = M x L = 2.5 x 0.008 = ?
mols KOH = 3x that.
M KOH = moles KOH/L KOH.

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