Final answer:
To find the partial pressure that would give a solubility of 0.100 M, we can use Henry's law by rearranging the equation P = C/k.
Step-by-step explanation:
In this question, we can use Henry's law to determine the solubility of a gaseous solute when its pressure changes. Henry's law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. The equation for Henry's law is:
C = kP
where C is the concentration (or solubility) of the gas in the liquid, k is the Henry's law constant, and P is the partial pressure of the gas.
In this case, we are given the solubility of He in water at a particular temperature: 0.080 M when the partial pressure is 1.7 atm.
To find the partial pressure that would give a solubility of 0.100 M, we can rearrange the Henry's law equation:
P = C/k
Substituting the given values, we have:
P = 0.100 M / 0.080 M/atm
= 1.25 atm
Therefore, a partial pressure of 1.25 atm would give a solubility of 0.100 M.