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van't Hoff factor: dissociation and association
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so093
The van't Hoff factor
i
for a
0.01
m
aqueous solution of
Na
X
2
SO
X
4
, assuming complete dissociation, is
A
1
B
2
C
3
D
4
Answer: C
Na
X
2
SO
X
4
→
2
Na
X
+
+
SO
X
4
X
2
−
gives three ions per formula unit. With complete dissociation,
i
=
3
.
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