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what is vant hoff factor of salt al2(so4)3.........................

Sandeep Pal , 9 Years ago
Grade 12
anser 2 Answers
Umakant biswal

Last Activity: 9 Years ago

@ sandeep 
the compound will dissociate as 2 al3+  and 3so4^2- 
so, total no of ions after dissociation = 2+3 =5 
vant hoff factor = total no of ions after dissociation / before dissociation = 5/1 = 5 
so, here the vant hoff factor will be 5 . 
HOPE IT CLEARS YOUR DOUBT 
ALL THE BEST ..
Dhruvi Vakharia

Last Activity: 6 Years ago

Al2(SO4)3   =>   2Al3+ + 3SO42-
      1                  0          0         (initial)
     0                 2          3         (final after dissociation)
 
Van’t Hoff factor (i) = Moles after dissociaton/ Total initial moles
That is, (i) = (2+3)/1
Thus, (i)= 5
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