Hi, i need help with colligative properties especially mole fraction and freezing/boiling point depression. Sometimes I am able to master these properties but most of the the time I don't. I really need to master this concept because I am still not quite comfortable with them. With most problems I don't know were to begin even though I have all the formulas in front of me. For example,
What mass of water is needed to dissolve 34.8 g of copper(II) sulfate in order
to prepare a 0.521 m solution?
Calculate the freezing point of a solution made from 32.7 g of propane,
C3H8, dissolved in 137.0 g of benzene, C6H6. The freezing point of benzene
is 5.50° C and its Kf
is 5.12° C/m.\
Calculate the concentration of nitrogen gas in a 1.00 L container exerting a
partial pressure of 572 mm Hg at room temperature. Henry’s law constant
for nitrogen at 25° C is 6.8 x 10-4 mol/L·atm.