Question

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle If the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3 2 kilopascals, what is the partial pressure of the hydrogen?

Answer 1

Answer: The partial pressure of hydrogen is 93.9 kPa.

Explanation:

To calculate the partial pressure of hydrogen, we will follow Dalton's Law.

This law states that the total pressure of a mixture of gases is equal to the sum of the individual pressures exerted by the constituent gases.

Mathematically,

$p_{total}=p_A+p_B$

According to the question,

$p_{total}=p_{H_2O}+p_{H_2}$

We are given:

$p_{total}=97.1 kPa$

$p_{H_2O}=3.2kPa$

$p_{H_2}= ?kPa$

Putting values in above equation, we get:

$97.1kPa=3.2kPa+p_{H_2}$

$p_{H_2}= 93.9kPa$

Hence, the partial pressure of hydrogen is 93.9 kPa.

Answer 2

Answer:

i think he is correct but i also think its b

Explanation: