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A) How many grams of solid sodium fluoride should be added to 2.00 L of a 0.190...

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Chemistry

A) How many grams of solid sodiumfluoride should be added to 2.00L of a 0.190 M hydrofluoric acidsolution to prepare a buffer with a pH of 2.425?

grams sodium fluoride = g.

B)   How many grams of solid sodiumfluoride should be added to 1.00L of a 0.299 M hydrofluoric acidsolution to prepare a buffer with a pH of 3.825?

grams sodium fluoride = g.

C) How many grams of solid ammoniumbromide should be added to 1.00 Lof a 9.88×10-2 Mammonia solution to prepare a buffer with a pH of10.080?  

grams ammonium bromide = g.

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