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The Van't Hoff factor for a 0.1 M Al2(SO4)3 solution is 4.20. The degree of dissociation is

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By Expert Faculty of Sri Chaitanya
a
80%
b
90%
c
78%
d
83%

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detailed solution

Correct option is A

Al2SO43     ⇌    2AI3+     +     3SO42-           1                     0                           0           1-α                2α                      3α i=1-α+2α+3α=1+4α=4.2⇒α=0.8


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