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7 August, 03:17

For the chemical reaction below, determine the amount of hi produced when 3.35 g of hydrogen is reacted with 50.75 g of iodine to produce hydrogen iodide

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  1. 7 August, 06:43
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    Molar mass of H₂ = 1.008 * 2 g/mol = 2.016 g/mol

    Molar mass of I₂ = 126.9 * 2 g/mol = 253.8 g/mol

    Molar mass of HI = (1.008 + 126.9) g/mol = 127.9 g/mol

    H₂ (g) + I₂ (g) → 2HI

    Mole ratio H₂ : I₂ : HI = 1 : 1 : 2

    Then the initial number of moles of H₂ = (3.35 g) / (2.016 g/mol) = 1.662 mol

    Initial number of moles of I₂ = (50.75 g) / (253.8 g/mol) = 0.2000 mol < 1.662 mol

    Hence, I₂ is the limiting reactant (limiting reagent).

    Number of moles of I₂ reacted = 0.2000 mol

    Number of moles of HI reacted = (0.2000 mol) * 2 = 0.4000 mol

    Mass of HI reacted = (127.9 g/mol) * (0.4000 mol) = 51.16 g
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