Buffer Solutions Page 2
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1
2C h e m g u i d e – q u e s t i o n s
5. In all these questions, K
for the ammonium ion, NH
+
, is 5.62 x 10
-10
mol dm
-3
.
a
4
a) Calculate the pH of a buffer solution containing 0.200 mol dm
-3
ammonia and 0.200 mol dm
-3
ammonium chloride.
b) Calculate the pH of a buffer solution containing 0.100 mol dm
-3
ammonia and 0.200 mol dm
-3
ammonium chloride.
c) In what proportions would you have to mix solutions of ammonia and ammonium chloride of the
same concentration in order to produce a buffer solution of pH 10.00?
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