Question

Answer True and false
1.The solubility of gases is directly proportional to the temperature and the partial pressure of the gas over solution
2. Raoult's Law (Psol=Psolv x Xsolv) indicates that when the mole fraction of the failure increase, vapor pressure of the solution increases.
Please give answer for number 3 multiple choice. "What are the major solute-solvent interactions created when KBr dissolves in water." A) dipole- dipole, B) dispersion, C)hydrogen bonding
, D)ion-dipole.

Answer 1

1. False - The physical reason for this is that when most gases dissolve in solution, the process is exothermic. This means that heat is released as the gas dissolves. This is very similar to the reason that vapor pressure increases with temperature. Increased temperature causes an increase in kinetic energy. The higher kinetic energy causes more motion in the gas molecules which break intermolecular bonds and escape from solution.

2. False - If a non-volatile solute (zero vapor pressure, does not evaporate) is dissolved into a solvent to form an ideal solution, the vapor pressure of the final solution will be lower than that of the solvent. The decrease in vapor pressure is directly proportional to the mole fraction of solute in an ideal solution.

3. A) Dipole - Dipole

D) Ion - Dipole