1. Aluminum sulfate can be made by the following reaction: 2AlCl3(aq)+3 H2SO4(aq) ?…

1. Aluminum sulfate can be made by the following reaction: 2AlCl3(aq)+3 H2SO4(aq)?Al(SO4)3(aq)+6HCl(aq). It is quit soluble in water, so to isolate it the solution has to be evaporated to dryness. This drives off the volatile HCl, but the residual solid has to be heated to a little over 200 celsius to drive off the water. In one experiment, 25.0 g of AlCl3 were mixed with 30.0 g of H2SO4. Eventually, 28.46 g of pure Al2(SO4)3 were isolated. Calculate the percentage yield. 2. The potassium salt of benzoic acid, potassium benzoate (KC7H5O2), can be made by the action of potassium permanganate

1. Aluminum sulfate can be made by the following reaction: 2AlCl3(aq)+3 H2SO4(aq)?Al(SO4)3(aq)+6HCl(aq). It is quit soluble in water, so to isolate it the solution has to be evaporated to dryness. This drives off the volatile HCl, but the residual solid has to be heated to a little over 200 celsius to drive off the water. In one experiment, 25.0 g of AlCl3 were mixed with 30.0 g of H2SO4. Eventually, 28.46 g of pure Al2(SO4)3 were isolated. Calculate the percentage yield. 2. The potassium salt of benzoic acid, potassium benzoate (KC7H5O2), can be made by the action of potassium permanganate on toluene (C7H8) as follows: C7H8+ KMnO4? KC7H5O2+ 2MnO2+ KOH+ H2O. If the yield of potassium benzoate cannot realistically be expected to be more tha 71%, what is the minimum number of grams of toluene needed to achieve this yield while producing 11.5g of potassium benzoate? 3. A chemist set up a synthesis of phosphorus trichloride by mixing 12.0g P with 35.0g Cl2 and obatained 42.2 g of PCl3. Calculate the percentage yield of this compound.

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