31. Solution to Chemistry Problem

31. Solution to Chemistry Problem

11. A 2.5 g sample of superphosphate was treated with water, filtered, and the filtrate was diluted to 250 ml. Ammonium molybdate was added to an aliquot of 10 ml, the resulting precipitate was separated and washed, treated with 25 ml of a 0.2435 M solution, and 5.05 ml of a 0.2205 M H2SO4 solution were used to titrate the excess alkali. Calculate the mass fraction of P2O5 in the superphosphate.

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