At 10°C one volume of water dissolves 3.10 volumes of chlorine gas at 1.00 atm pressure.What is the Henry's Law constant in mol/L·atm?
A)0.043
B)0.13
C)3.1
D)3.8
E)36.

Question

Quizplus · Accepted Answer

According to Henry's Law, the concentration of a gas in a solution is directly proportional to the partial pressure of the gas above the solution. The proportionality constant is the Henry's Law constant, which has units of mol/L·atm.

In this problem, we know that at 10°C and 1.00 atm pressure, one volume of water dissolves 3.10 volumes of chlorine gas. This means that the concentration of dissolved chlorine gas is 3.10/1 = 3.10 M.

Using Henry's Law, we can write:

C = kP

where C is the concentration of dissolved gas, P is the partial pressure of the gas, and k is the Henry's Law constant.

At 10°C and 1.00 atm pressure, we know that C = 3.10 M and P = 1.00 atm. Therefore:

k = C/P = 3.10/1.00 = 0.13 mol/L·atm

Therefore, the answer is B (0.13).

At 10°C One Volume of Water Dissolves 3