As the number of solute particles in a solution increases, the effect on the freezing point of the solution increases. which ionic compound will lower the freezing point the most if 1 mol of it is added to 1 l of water?

alcl3

nacl

kbr

mgcl2

AlCl₃

Explanation:

Impurities depressing the freezing point of a solvent  is called colligative property . It depends upon no of particles or ions of impurities. When the given compounds are dissolved in water , they break into ions and depress the freezing point . No of ions formed by one molecule of compound AlCl₃  on ionization is  highest ( 4 ) . So this compound will have highest strength to lower the  freezing point of solvent.

AlCl₃  = Al⁺⁺⁺  +   3Cl⁻

Total no of ions after ionization

= 1 + 3 = 4 .

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