Through 24.4 L of a mixture of hydrogen, oxygen and chlorine an electric discharge is passed. After cooling the reaction products, gas and liquid were found in the vessel. To neutralize the liquid, 1.

Question

Through 24.4 L of a mixture of hydrogen, oxygen and chlorine an electric discharge is passed. After cooling the reaction products, gas and liquid were found in the vessel. To neutralize the liquid, 1.6 g of sodium hydroxide was required. The gas reamining in the vessel reacted fully with heated cupric oxide, and the mass of latter decreased by 0.96 g . The volume % of $H_{2}$ in the mixture is $____$ .

[Given 1 mol = 24.4 L under the reaction temperature and pressure conditions, Atomic masses: Na = 23, O = 16, Cu = 63.5, Cl = 35.5]

TestHub · Accepted Answer

H 2 ​ + Cl 2 ​ ⟶ 2 HCl ; 2 H 2 ​ + O 2 ​ ⟶ 2 H 2 ​ O n total ​ = 1 n NaOH ​ = 0.04 ⇒ n HCl ​ = 0.04 ⇒ n Cl 2 ​ ​ = 0.02 ⇒ n H 2 ​ ​ consumed by C l 2 ​ = 0.02 CuO + H 2 ​ ⟶ Cu + H 2 ​ O 1 mol H 2 ​ = 16 g O ⇒ 0.96 g O = 0.06 mol H 2 ​ ] n H 2 ​ ​ + n O 2 ​ ​ reacting together to form water = 0.9 2 H 2 ​ + O 2 ​ ⟶ 2 H 2 ​ O 0.6 0.3 % H 2 ​ = 1 0.6 + 0.06 + 0.02 ​ × 100 = 68

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