Question

Anhydride of an acid X contains 2 phosphorous atoms, 5 oxygen atoms. If this acid X is made to react with bases like sodium hydroxide, calciurn hydroxide and aluminum hydroxide, what will the formulae of the corresponding normal salts formed be?

Answer 1

(i) Identification of X from the respective anhydride.
(ii) Predicting the formulae of the bases based on nomenclature.
(iii) Nature of reaction between acid X and respective bases.
(iv) Predicting the valency of negative redical in X.
(v) Predicting the valency of sodium, calcium and aluminium respectively.
(vi) Applying crisscross method to determine formulae of the corresponding salts.