solutions(henrys law)

Question 1

What is Henry’s law?

Answer 1

The mass of a gas dissolved in a given amount of a liquid at constant temperature is directly proportional to the pressure of gas present in equilibrium with the liquid

mαP, where m=KP

Question 2

What do the variables m, P, and K represent in Henry’s law?

Answer 2

m = mass of the gas dissolved in a unit volume of the solvent, P = pressure of the gas in equilibrium with the solvent, K = Henry’s Constant

K is specific to each gas-solvent combination

Question 3

What factors affect Henry’s law constant?

Answer 3

• The nature of the gas
• The nature of the solvent
• Temperature
• Pressure

These factors can influence the solubility of gases in liquids

Question 4

Is Henry’s law applicable to ideal gases only?

Answer 4

Yes

It is not applicable to gases that undergo a chemical reaction

Question 5

What are the conditions for a gas to be applicable under Henry’s law?

Answer 5

• The gas should be only slightly soluble in the liquid
• The gas should neither undergo association nor dissociation in the solvent

Ideal conditions for the law to hold true

Question 6

Is Henry’s law valid for the solubility of HCl gas in water?

Answer 6

No

HCl is highly soluble in water, which violates the conditions for Henry’s law

Question 7

What is the solubility behavior of NH3 in benzene according to Henry’s law?

Answer 7

Valid

NH3 is sparingly soluble in benzene, meeting the criteria of Henry’s law

Question 8

Fill in the blank: Henry’s law states that the mass of a gas dissolved in a liquid is _______ to the pressure of the gas in equilibrium.

Answer 8

directly proportional

Question 9

True or False: Henry’s law can be applied to gases that undergo a chemical reaction.

Answer 9

False

Question 10

What happens to HCl and NH3 when dissolved in water?

Answer 10

HCl dissociates into H3O+ and Cl-, NH3 reacts with water to form NH4OH

These reactions indicate that these gases do not meet the criteria for Henry’s law in water