The Van't Hoff factor `0.1M la(NO_(3))_(3)` solution is found to be `2.74` the percentage dissociation of the salt is:

Options

A. `85%`
B. `58%`
C. `65.8%`
D. `56.8%`

Answer

B

Explanation

`{:(La(NO_(3))_(3)rarr,La^(3+)+,3NO_(3)^(-)),(1,,),(1-alpha,alpha,3alpha):}`
`1 +3 alpha = 2.74`
`3 alpha = 1.74`
`alpha = 0.58 = 58%`