10. The solubility of a gas in a liquid can always be increased by A) decreasing

Question

10. The solubility of a gas in a liquid can always be increased by A) decreasing the pressure of the gas above the solvent. B) increasing the pressure of the gas above the solvent C) increasing the temperature of the solvent. D) decreasing the polarity of the solvent. E) decreasing the temperature of the gas above the solvent 11. Determine the Henry's law constant for ammonia in water at 25 C if an ammonia pressure of produces a solution with a concentration of 1.3 M. A) 59 M/atm B) 0.017 M/atm C) 0.029 M/atm D) 35 M/atm E) 0.038 M/atm 12. Give the reason that antifreeze is added to a car radiator. A) The freezing point is lowered and the boiling point is elevated B) The freezing point is elevated and the boiling point is lowered C) The freezing point and the boiling point are elevated. D) The freezing point and the boiling point are lowered. 13. Choos the asqusous solution that hus the te e paaamolaile solutes, and you should assume ideal van't Hoff factors where applicable. A) 0.100 m AICI3 B) 0.100 m NaCl C) 0.100 m MgCl2 D) 0.100 m C6H1206 Page 5 of 14

Explanation / Answer

Ans 10 : B) increasing the pressure of the gas above the solvent

According to Henry's Law , the solubility of gas is directly proportional to the pressure of gas above the solvent.

When the pressure is increased , the gas molecules are forced inside the solvent which increases its solubility in the solvent.

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