15 cm3 of 0.2 mole solution hydroxide react with 10cm3 of 0.15 mole of phosphoric acid H3PO4. Find the formula of the salt formed?
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Expert's answer
2017-04-29T09:06:08-0400
Number of moles of acid and hydroxide equal: n(H3PO4) = C·V = 0.15·0.01 = 0.0015 (moles) n(Me(OH)x) = C·V = 0.2·0.015 = 0.003 (moles) Thus, n(H3PO4): n(Me(OH)x) = 1:2 The balanced chemical equation is: 2 Me(OH)x + H3PO4 → Me2HPO4 + 2H2O So the metal has a valence I, and general formula of hydroxide is MeOH. So the formula of formed salt is Me2HPO4.
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