Chemistry question help please?

Question

In Arctic regions, snow lies on the ground all winter. As the spring approaches and air warms up, some of the water in snow evaporates. Later, all the snow melts.

1) How does the evaporation of the water in the snow affect the concentrations of acid in snow?

week------pH

1 -----------7.1

2 -----------7.0

3 -----------6.9

4 -----------6.8

5 -----------5.5

6 -----------5.0

7 -----------4.7

8 -----------5.1

9 -----------5.5

10----------5.9

2) why do you think the pH changed in week 5-7?

3) why do you think the pH changed in week 8-10?

Answer 1

Didn't like the answers to this Q 1/2-hour ago or is the system having trouble keeping up?

Here again:

The materials producing the acid have a much LOWER evaporation rate than does water. When water evaporate the acid concentration rises; when water is added (rain/snow) the concentration is lowered. Over many weeks the pH would be expected to go up and down depending on the weather (sunny, rainy/snowy) and certainly seasonally.

Answer 2

1). It becomes greater, i.e, more concentrated

2). It was very sunny and a bunch of snow evaporated

3). It snowed again