Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid,...

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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described

Solid ammonium chloride, NH,CI, is formed by the reaction of gaseous ammonia, NH,, and hydrogen chloride, HCI. NH,() + HCI(g)

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Answer 1

Answer #1

K Balanced equation:
MnO₂ + 4 HCl ====> MnCl₂ + 2 H₂O + Cl₂

Let us calculate the moles of Cl2 using following ideal gas equation

PV= nRT

P = Pressure in atm = 725 Torr = 0.953947 atm V= Volume in Liter = 275 ml = 0.275 Liter

n = no of moles = ? R = 0.08206 L atm K-1 Mol-1

T = Temperature in Kelvin = 298 K

n = PV / RT

n = 0.953947 atm x 0.275 L / 0.08206 L atm K-1 Mol-1 x 298 K = 0.01072 Moles

Moles of Cl2 produced = 0.01072 Moles

Moles of MnO2 required = 0.01072 Moles

Molar mass of MnO2 = 86.936 g/mol

Mass of MnO2 required = 0.01072 Moles x 86.93 g/mol = 0.9319 g

Balanced equation: MnO2 + 4 HCl = MnCl2 + 2 H2O + Cl2 Reaction stoichiometry Limiting reagent Compound Coefficient Molar Mass

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Answer 2

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