This is an acid-base reaction. Acid: $H_3PO_4$ Base: $NaOH$
Work Step by Step
An acid-base reaction follows the pattern: $Acid + Base --\gt Salt + Water$ In this case: $Acid = H_3PO_4$ $Base = NaOH$ $Salt = NaH_2PO_4$ $Water = H_2O$
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