Question

The freezing point of a solution will ____________ and the boiling point will ____________ with _____________ molality of a nonvolatile solute. increase, increase, increasing increase, increase, decreasing decrease, increase, increasing decrease, decrease, decreasing

Answer 1

The freezing point of a solution will increase and the boiling point it will decreasing with increasing molality of a nonvolatile solute.

Answer should be bold it in.

Answer is C.

Hope it helped you.

-Charlie

Answer 2

Answer: C) decrease, increase, increasing.

Explanation: There is a depression in freezing point when a non volatile solute is added to the solvent and an elevation in boiling point when a non volatile solute is added to a solvent.

Pure water freezes at zero degree C. If a non volatile solute is added to water then solution freezes below zero degree C. On the other hands, if a non volatile solute is added to a solvent then boiling point increases.

The relationship between depression in freezing point and molality is shown by the equation:

$\Delta T_f=-i*m*k_f$

where, $\Delta T_f$ is depression in freezing point, i is Van't hoff factor, m is molality and kf is the molal freezing point depression constant.

We have almost similar equation for elevation in boiling point.

$\Delta T_b=i*m*k_b$

$\Delta T_b$ stands for elevation in boiling point and kb stands for molal boiling point constant.