What was the chemical equation before balancing of the following.
1) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
2) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
3) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

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Solution

Dear student,

(1) 2H₂S+3O₂----------- 2H₂O+2SO₂
₍₂₎ 3 BaCl₂ (aq) + + Al₂(SO₄)₃(aq) → 2 AlCl ₃ (aq) + 3 BaSO₄(s)
(3) 2K + 2H₂O --------> 2KOH + H₂

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