Question

3 attempts et Check my work Enter your answer in the provided bex Report problem Hydrogen fluoride is used in the manufacture of Freons (which destroy and in the production of aluminium metal. It is prepared by the reaction one in the stratosphere) CaF2 + H2SO4 - Caso2HF Solution Guided Solution In one process, 6.15 kg of Cal, is treated with an excess of H2SO, and yields 2.65 kg of HF. Calculate the percent yield of HF. % yield < Prey 14 of 20 Next >

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Answer 1

615 kg cafe molan mass of cafa= 78 gimol a moles of cafe = 6.15 = 0.07885 K moles 78 - Cafe + Hasot — casoe + HF 1 mol cafa gives a moles of Hf so 0.07885knol cara will give ax0007885 = 0.1579 kmal HF . 1 molar mass of HF = 20 ginal a mass theoritical yield of HF = 0.1577420 = 3.15 kg actual gield of HF = 2-65 kg 3-18 xloo = Ca Scajnegield of HF = CañScanner 84.6%