Answer the following: a) Why molality is considered better than molarity to express concentration of a solution? b) What is Henry's law?

Answer the following:

a) Why molality is considered better than molarity to express concentration of a solution?

b) What is Henry's law?

Expert Solution

Ans:

a)

Molality is considered better because molality does not change with temperature while molarity does.

b)

Solubility of a gas in a liquid is directly proportional to the pressure of gas on the surface of liquid.

Concentration (C) of a gas in a solution is directly proportional to the partial pressure (P) of the gas in the solution.

P ∝ C (or) P = kH.C; kH is Henry's law constant

Molality does not change with temperature while molarity does. Solubility of a gas in a liquid is directly proportional to the pressure of gas.

Shams answered 2 years ago

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