Question

A sample of sparkling water (CO2 in water) is under 4.0 atmospheres of pressure. Its current solubility is 0.25 g/mL. What will be the new solubility when the pressure is reduced to 1.5 atmospheres?

a) 0.094 g/mL
b) 0.25 g/mL
c) 0.0625 g/mL
d) 0.0375 g/mL

Answer 1

The new solubility of the sparkling water will be 0.094 g/mL.

Step-by-step explanation:

According to Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. In this case, the solubility of CO2 in water is affected by the pressure change. We can use the equation:

solubility1/solubility2 = pressure1/pressure2

Given that the initial pressure is 4.0 atmospheres and the initial solubility is 0.25 g/mL, and the final pressure is 1.5 atmospheres, we can substitute these values into the equation:

0.25/solubility2 = 4.0/1.5

Solving for solubility2, we find that the new solubility is 0.094 g/mL (option a).