1.

The BaCl_(2) ionises to an extent of 80% in aqueous solution, the value of van't Hoff factor is -

Answer»

2.6
0.4
0.8
2.4

Solution :`BaCl_(2) rarr Ba^(2+) + 2CL^(-) :. n=3`
`ALPHA = (% alpha)/100 =80/100=0.8`
`alpha = (i-1)/(n-1)`
`:. 0.8 = (i-1)/(3-1)`
` :. 0.8 xx 2 = i - 1`
1.6 + 1 = I
i=2.6`


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