You have gone into the field to take water samples from two lakes in your town.

You note the following observations:

Lake A contained many fish swimming in its waters.

Lake B had very few fish swimming in its waters, and a few dead fish floating on the water.

You return to your lab and take pH readings for each sample.

Think about how acids and bases would affect the water quality in the two lakes.

Which set of pH data would you expect to see based on your observations?

Lake A: pH = 4.5; Lake B: pH = 7.5

Lake A: pH = 8.3; Lake B: pH = 3.7

Lake A: pH = 6.6; Lake B: pH = 6.8

Lake A: pH = 10.2; Lake B: pH = 1.7

B is the answer.