Problem: Question 9 (10 points) Why is the concentration in the freezing point depression molality instead of molarity? (i) Poor molality isn't used much, so why not here. (ii) Molarity changes with temperature, so is not a good unit for this type of experiment. (iii) The lowercase m looks better in this equation. (iv) when the van't Hoff factor is used molality must be the concentration unit.

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(i) Poor molality isn't used much, so why not here. (False)

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Question 9 (10 points) 

Why is the concentration in the freezing point depression molality instead of molarity? 

(i) Poor molality isn't used much, so why not here. 

(ii) Molarity changes with temperature, so is not a good unit for this type of experiment. 

(iii) The lowercase m looks better in this equation. 

(iv) when the van't Hoff factor is used molality must be the concentration unit.

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