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29 May, 14:34

How many liters of chlorine gas at 650 mmhg and 25c can be produced by the reaction of 2.00 l of 2.50 m hcl solution with excess mno2?

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  1. 29 May, 17:03
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    First, write the reaction so that you would know the stoichiometric coefficients.

    4 HCl + MnO₂ - - > Cl₂ + MnCl₂ + 2 H₂O

    Moles HCl: 2.50 mol/L * 2 L = 5 mol

    Moles Cl₂ produced: 5 mol HCl * 1 mol Cl₂/4 mol HCl = 1.25 mol Cl₂

    Assuming ideal gas behavior,

    PV = nRT

    Solving for V,

    V = nRT/P

    The pressure in mmHg is equivalent to atm using the conversion: 760 mmHg = 1 atm.

    V = (1.25 mol) (0.0821 L-atm/mol-K) (25+273 K) / (650 mmHg*1atm/760 mmHg)

    V = 35.76 L
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