heat is liberated in the reactions where water is added to calcium oxide and hydrochloric acid added to zinc pieces ?write equation for above reaction
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This reaction is highly exothermic (produces vigorous heat). If water (containing acid or not) is added in sufficient quantity, vapours, bubbles (due to boiling) and hissing sounds can be observed. Addition of acid, further increases the heat of the reaction.
Overall reaction: CaO + 2 HCl =CaCl2 + H2O
It is a double replacement (AB +DC = BC + AD) acid-base reaction.
CaO is a (Lewis) base. Hcl is a (Brønsted) acid. CaCl2 is a salt. In aqueous solution, HCl + H2O = H3O+ + Cl-
Formation of slaked lime from quick lime in an aq. form HCl, i.e.
CaO + H2O = Ca(OH)2 leads to further production of water soluble calcium chloride salt by this reaction: Ca(OH)2 +2 HCl = CaCl2 + 2 H2O
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