Molar mass of Na2SO4 dissolved in water is determined from depression of freezing point experiment. Molar mass of Na2SO4 observed can never be
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a
71 g
b
56.8 g
c
213 g
d
90 g
answer is C.
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Detailed Solution
Na2SO4 in water undergoes dissociation.∴ i ranges from 1 to 3i.e., i > 1i=MnormalMabnormal Mabnormal=Mnormali ∵ i is greater than 1, Mabnormal can never be greater than Mnormal (142)