Which aqueous solution has the lower freezing point, 0.1 m CaCl2 or 0.1 m glucose? Type the name of the formula unit or molecule?

1 Answer
Feb 21, 2018

#CaCl_2#

Explanation:

An approximative very used formula for crioscopy is #Delta T= k xx i xx m xx # where K depends by the type of solvent, m is the molality and i is the numbers of fractions (often ions) ; it can include also numbers minor of 1 as 0,5 in the dimerization of acetic acid in organic solvents. In our example from #CaCl_2# you have three ions while glucose doesn't dissociate so for #CaCl_2# the lowering of frezing temperature it will be three times bigger