Passage III
A mole is 6 x 1023 molecules or formula units of a compound. Thus, the number of sucrose molecules in 1 mole of sucrose equals the number of NaCl units in 1 mole of NaCl. Molality (m) is a unit of concentration defined as:
When a substance is dissolved in a solvent, the freezing and boiling points of the solution will differ from those of the pure solvent. These changes depend on the concentration show how the freezing point and the boiling point, respectively, of H2O at 1 atm of pressure vary with concentration for 3 solutes.
16. Based on Figure 1, as the mass of sucrose dissolved in a given amount of solvent increases, the freezing point of the solution will:
Your Answer is
Correct Answer is H
Explanation
The increase in the mass of Sucrose is actually equivalent to the increase in concentration. Look at figure 1, as the abscissa concentration increases, the ordinate freezing point decreases in a straight line