posted by April on .
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?
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 = ?