Answer:
Explanation:
1. Boling point
The boiling point of a solvent will increase when a solute is added. The boiling point elevation is a colligative property.
When a nonvolatile, nonelectrolyte solute is added to a solvent, the increase of the boiling point may be calculated using the formula:
[tex]\Delta T_b=m\times K_b[/tex]
Where m is the molality and Kb is the the molal boiling point constant (for water, Kb = 0.512ºC/m ).
Substitute and compute:
[tex]\Delta T_b=0.516m\times 0.512\º C/m\\\\\Delta T_b=0.264\º C[/tex]
Hence, add the increase in the boiling point to the normal boiling point of water: 100.000ºC
[tex]T_b=100.264\º C[/tex]
2. Freezing point
The freezing point of a solve will decrease when a solute is added. The depression on the freezing point is another colligative property.
When a nonvolatile, nonelectrolyte solute is added to a solvent, the depression of the boiling point may be calculated using the formula:
[tex]\Delta T_f=m\times K_f[/tex]
Where m is the molality and Kf is the the molal freezing point constant (for water, Kf = 1.86 ºC/m ).
Substitute and compute:
[tex]\Delta T_f=0.516m\times 1.86\º C/m\\\\\Delta T_f=0.960\º C[/tex]
Subtract the decrease on the freezing point from the normal freezing point of water: 0.000ºC
[tex]T_f=-0.960\º C[/tex]
