Two acids H2SO4 and H3PO4 are neutralized separately by the same amount of an alkali when sulfate and dihydrogen orthophosphate are formed respectively. Find the ratio of the masses of H2SO4 and H3PO4 (P = 31).
1 g equivalent of alkali (NaOH) will neutralize 1 g Eqn. of H2SO4 and 1 g eq. of H3PO4. For the given neutralization reaction. H2SO4 + 2 NaOH → Na2SO4 + 2 H2O H3PO4 + NaOH = Na H2PO4 + H2O Eq. wt. of H2SO4 = Mol. wt. 2=982 = 49; Eq wt. of H3PO4 . Mol. wt. 1 = 98 Hence the ratio of masses of H2SO4 and HPO4 = 49: 98 = 1: 2.
