Calculate the freezing and boiling point of a solution CHEM HELP?
Calculate the freezing point and boiling point of a solution containing 12.8 g of naphthalene (C10H8) in 104.0 mL of benzene. Benzene has a density of 0.877 g/cm3
- ChemTeamLv 74 weeks ago
Look at problem #3:
- davidLv 74 weeks ago
find the molality of the solution
1 .. find molar mass of C10H8 = ???
2. moles of C10H8 ... 12.8 / molar mass = ???
3. find kilograms of benzene .. 104.0 X 0.877 / 1000 .... use a calculator
4. find molality of the solution .. answer 2 / answer 3
5. use the formula ,,,
delta T = molal freexing point depression constant X molality (answer from 4)
... 6 ... look up normal freexing point of pure benzene .... then subtract delta T (answer 5)
======= similarly for boiling point elevation
... you have the book with all the constants, I don't. This is how to do it.