Colligative Properties of Solutions

What mass of Iodine, (molar mass= 253.80 g/mol), must be used to prepare a .960m solution if 100.0g of ethanol, CH3CH2OH, is used? $molality=\ \frac{moles\ of\ solute}{kg\ solvent}$  

• 50.0 g

• 96.0 g

• 2.54 g

• 24.4 g

A 2m solution contains

• 2 mol of solute dissolved in 1L of solvent

• 1 mol of solute dissolved in 2L of solvent

• 2 mol of solute dissolved in 1 mol of solvent

• 2 mol of solute dissolved in 1 kg of solvent

Colligative properties depend on the

• number of solute particles present

• size of solute particles present

• mass of solute particles present

• charge on solute particles present

Colligative properties include

• freezing point

• boiling point

• osmotic pressure

• all of the above

What is the freezing point of a 1.5m solution of sucrose in water? (Kf= -1.86 C/m)

• -2.8 degrees C

• -1.2 degrees C

• - .81 degrees C

• .81 degrees C