Chemistry
(a) What do you mean by an acid salt ?
(b) Define the term 'Electronegativity'.
(c) State what do you see when a basic gas is passed over heated copper oxide.
(d) Write a balanced equation for the above reaction in (c).
(e) Draw an electron dot diagram of the negative ion formed when a basic gas is dissolved in water.
Acids Bases Salts
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Answer
(a) Acid salts are the salts formed by partial replacement of the replaceable hydrogen ion of an acid molecule by a basic radical [metallic or ammonium ion]. Examples — Sodium Hydrogen Sulphate [NaHSO4], Disodium Hydrogen Phosphate [Na2HPO4]
(b) The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is called its electronegativity.
(c) Ammonia is a basic gas and a strong reducing agent. It reduces the black Copper [II] oxide to reddish brown Copper with the evolution of nitrogen gas.
(d) 2NH3 + 3CuO ⟶ 3Cu + 3H2O + N2 [g]
(e) The ion formed is Hydroxyl ion. Its electron dot diagram is shown below:
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