\ 9. What mass of

NaCl

is needed to prepare

125mL

of a

2.5M

solution? (Remember that

M

=

molarity

=

moles solute per liter of solution.)\ aensity\ 10. What is the molality of the sodium chloride solution in question 9 ? The density of the solution is

1.02(g)/(m)L

. (Remember that

m=

molality = moles solute per

kg

solvent, not moles solute per

kg

solution!)

Boiling point of CaCl2=100C+0.384C= 9. What mass of NaCl is needed to prepare 125mL of a 2.5M solution? (Remember that M = molarity = moles solute per liter of solution.) sensity 10. What is the molality of the sodium chloride solution in question 9 ? The density of the solution is 1.02g/mL. (Remember that m= molality = moles solute per kg solvent, not moles solute per kg solution!)