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A) How many grams of solid sodium fluoride should be added to 1.00 L of a 0.218...

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Chemistry

A) How many grams of solid sodiumfluoride should be added to 1.00L of a 0.218 M hydrofluoric acidsolution to prepare a buffer with a pH of 3.847?

grams sodium fluoride=  g.

B)How many grams of solid sodiumhypochlorite should be added to0.500 L of a 0.297 Mhypochlorous acid solution to prepare a bufferwith a pH of6.803 ?

grams sodium hypochlorite=  g.

C)How many grams of solid ammoniumchloride should be added to 1.50L of a 0.152 M ammonia solutionto prepare a buffer with a pH of 8.330?  

grams ammonium chloride=  g.

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