Question

Does pollution change the rate of evaporation?

Answer 1

Yes. Excess pollutants slows the rate of evaporation.

Explanation:

Raoult's law says that the vapor pressure of mixture is the sum of the partial vapor pressure of each component multiplied by its mole fraction.

Let `a,b`… the component of the mixture.
`p=p_ax_a+ p_bx_b+ …`
`p` is the total vapor pressure, `p_a, p_b`... are partial vapor pressure of `a,b`… and `x_a, x_b`… are their mole fraction.

If the amount of pollutants in water increases, `color(red)"the mole fraction of water will decrease."` This means that vapor pressure of water also goes down and evaoration is decelerated.

https://en.wikipedia.org/wiki/Raoult%27s_law