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18 September, 20:48

When 15.6 g of fluorite (caf2) reacts with excess sulfuric acid, hydrogen fluoride gas is collected at 709 torr and 25.5°c. solid calcium sulfate is the other product. what gas temperature is required to store the gas in an 7.40âl container at 899 torr?

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  1. 18 September, 22:16
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    The reaction equation is:

    CaF₂ + H₂SO₄ → 2HF + CaSO₄

    The molar ratio between fluorite and hydrogen fluoride is 1 : 1.

    The moles of fluorite supplied are:

    Moles = 15.6 / 78.07

    Moles = 0.200

    The moles of hydrogen fluoride produced will be 0.2.

    Now, we may use the ideal gas equation to determine the temperature:

    PV = nRT

    T = PV/nR

    T = (899 * 7.4) / (0.2 * 62.36)

    T = 533.40 K

    The temperature will be 260.25 °C
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