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CBSE Class 12-science Answered

How do we find vant Hoff factor i
Asked by arnavvidudala20050 | 12 May, 2020, 10:41: AM
answered-by-expert Expert Answer

The relationship between the actual number of moles of solute added to form a solution and the apparent number as determined by colligative properties is called the van't Hoff factor (i).

 

 It is used to express the extent of association or dissociation of solute. If association or dissociation of solute particles takes place in the solution, then

 

Let's understand it by few examples-
In space KCl KCl rightwards arrow straight K to the power of plus space plus space Cl to the power of minus straight i equals fraction numerator Number space of space particles space after space dissociation over denominator number space of space particles space of space solute space dissolved end fraction equals 2 over 1 straight i equals 2 In space straight K subscript 2 SO subscript 4 straight K subscript 2 SO subscript 4 rightwards arrow 2 straight K to the power of plus space plus space SO subscript 4 superscript negative 2 end superscript straight i equals 3 over 1 equals 3
Answered by Ravi | 12 May, 2020, 05:47: PM

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