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In one process of 5.75 kg of CaF2 are treated with an excess of H2SO4 and yield 2.85 kg of Hf calculate the percent yield of hf?

  • chemistry -

    Do you mean HF as in hydrofluoric acid. Hf is hafnium.
    Write and balance the equation.
    Convert g CaF2 to mols. moles = grams/molar mass.

    Use the coefficients to convert mols CaF2 to mols HF (not Hf)

    Convert mols HF to g. g = mols x molar mass. This is the theoretical yield (T. E.).

    %yield = (actual yield/T.E.)*100 = ?

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