Question

question 3
when you add an unknown fatty acid to stearic acid, the freezing
point of the solution
a) will increase
b) will decrease
c) wont change
d) will become 0 °c
e) will become 0 k
chem 1120: introduction to chemistry techniques iclickers
select an answer

Explanation:

When a solute (the unknown fatty acid) is added to a solvent (stearic acid), according to the colligative property of freezing - point depression. Colligative properties depend on the number of solute particles in the solution. The presence of solute particles disrupts the orderly arrangement of solvent molecules during freezing, so the freezing point of the solution is lower than that of the pure solvent.

Answer:

B. will decrease