On a clear day at sea level, the partial pressure of N2 in air is 0.78 atm at 25 degres C. Under these conditions, the concentration of N2 in water is

5.3 x 10^-4 M. What is the partial pressure of N2 when the concentration in water is 3.5 x10^-4 M?

To solve this question, we can use Henry's law, which states that the partial pressure of a gas above a liquid is directly proportional to its concentration in the liquid.

Henry's law equation: P = k * c

where:
P = partial pressure of the gas
k = Henry's law constant
c = concentration of the gas in the liquid

Let's solve for the Henry's law constant in this case:

Given:
Partial pressure of N2 (P1) = 0.78 atm
Concentration of N2 (c1) = 5.3 x 10^-4 M

Using Henry's law equation, we can write:
P1 = k * c1

Rearranging the equation:
k = P1 / c1

Now we can calculate the value of k:
k = 0.78 atm / (5.3 x 10^-4 M)

k ≈ 1471.7 atm·M^-1

Now we can use the calculated value of k to find the partial pressure of N2 when the concentration in water is 3.5 x 10^-4 M:

Given:
Concentration of N2 (c2) = 3.5 x 10^-4 M

Using Henry's law equation, we can write:
P2 = k * c2

Plugging in the values:
P2 = 1471.7 atm·M^-1 * (3.5 x 10^-4 M)

P2 ≈ 0.515 atm

Therefore, the partial pressure of N2 when the concentration in water is 3.5 x 10^-4 M is approximately 0.515 atm.

To find the partial pressure of N2 when the concentration in water is 3.5 x 10^-4 M, we can use Henry's Law.

Henry's Law states that the concentration of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. It can be represented as:

C = k * P

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

In this case, we are given the concentration of N2 in water (C = 3.5 x 10^-4 M) and the partial pressure of N2 in air (P = 0.78 atm). We need to find the new partial pressure of N2 when the concentration in water changes.

First, we need to determine the Henry's Law constant, k. This constant is specific to the gas and the solvent. Given that we are dealing with N2 in water, we can assume that k will remain constant throughout the process.

Once we have the value of k, we can rearrange the Henry's Law equation to solve for the new partial pressure (P'):

P' = C' / k

where C' is the new concentration in water (3.5 x 10^-4 M).

By substituting the given values into the equation, we can calculate the partial pressure of N2 when the concentration in water is 3.5 x 10^-4 M.

First determine the constant in

p = Kc*C
You're given p and C, solve for Kc.

Then using that value for Kc, plug in M and Kc and solve for pN2.