152 DIY Science: Illustrated Guide to Home Chemistry Experiments
RQEWEvI UESTIOnS
q 1 : Name and define the unit of concentration used in calculating values for colligative properties of solutions. Why is this unit of
concentration used rather than molarity?
q: 2 The Kbp for H 2 O is 0.512°C/molal. Applying this value and the van’t Hoff factors for sodium chloride (2) and sucrose (1) to the
boiling point elevation values you recorded in Table 8-1, calculate the formula weights of sodium chloride and sucrose. Record these
calculated values in Table 8-1.
q: 3 What effect on boiling point would you expect if you dissolved sufficient ethanol in water to produce a 1 molal solution?