In: Chemistry
A) How many grams of solid sodium
fluoride should be added to 1.00
L of a 0.218 M hydrofluoric acid
solution to prepare a buffer with a pH of 3.847
?
grams sodium fluoride
=  g.
B)How many grams of solid sodium
hypochlorite should be added to
0.500 L of a 0.297 M
hypochlorous acid solution to prepare a buffer
with a pH of6.803 ?
grams sodium hypochlorite
=  g.
C)How many grams of solid ammonium
chloride should be added to 1.50
L of a 0.152 M ammonia solution
to prepare a buffer with a pH of 8.330
?  
grams ammonium chloride
=  g.