Chemistry
Write balanced chemical equations for the following :
(a) Sodium thiosulphate is reacted with dilute hydrochloric acid.
(b) Calcium bicarbonate reacts with dilute hydrochloric acid.
(c) Conc. hydrochloric acid and potassium permanganate solution.
(d) Action of dilute hydrochloric acid on sodium sulphide.
(e) Action of hydrochloric acid on sodium bicarbonate.
Hydrogen Chloride
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Answer
(a) Na2S2O3 + 2HCl ⟶ 2NaCl + S + H2O + SO2 ↑
(b) Ca(HCO3)2 + 2HCl ⟶ CaCl2 + 2H2O + 2CO2 ↑
(c) 2KMnO4 + 16HCl 2KCl + 2MnCl2 + 8H2O + 5Cl2↑
(d) Na2S + 2HCl ⟶ 2NaCl + H2S [g.] ↑
(e) NaHCO3 + HCl ⟶ NaCl + H2O + CO2 ↑
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How would you distinguish between dilute HCl and dilute HNO3, by addition of only one solution.
State one appropriate observation when :
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(c) Lead nitrate solution is mixed with dilute hydrochloric acid and heated.
(d) A small piece of zinc is added to dilute hydrochloric acid.
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A : Sodium Chloride ⟶ Hydrogen Chloride
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C : Hydrogen Chloride ⟶ Ammonium chloride
D : Hydrogen Chloride ⟶ Lead chloride.
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