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An aqueous solution containing 0.25 mole...

An aqueous solution containing 0.25 moles of a strong electrolyte A in 500 g of water freezes at `-2.8^(@)C`. How many ions are formed per formula unit of A `(K_(f)=1.86^(@)C)` ?

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaT_(f)=2.8^(@)C`
`DeltaT_(f)` (observed) `= iK_(f) xx m`
`2.8 = ixx 1.86 xx 0.50`
or `i=(2.8)/(1.86 xx 0.50)=3`
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