Question

In an experiment, a scientist compares the effect of adding acid rain to samples taken from two different lakes. The scientist observes that ten drops of acid rain added to water taken from Lake Minnetonka in southern Minnesota does not change the pH from 7.5, but ten drops of acid rain added to water taken from Upper Kintla Lake in Glacier National Park causes the pH to change from 7.5 to 5.2.

Answer 1

Acid rain is rainwater with a pH of less than 5 due to dissolved nonmetal oxides forming acids. The experiment showed that Lake Minnetonka water was able to neutralize acid rain, while Upper Kintla Lake water was not.

Step-by-step explanation:

Acid rain is rainwater that has a pH of less than 5, due to a variety of nonmetal oxides being dissolved in the water and reacting with it to form acids. The lower the pH, the more acidic the substance is. In the example given, adding ten drops of acid rain to water from Lake Minnetonka did not change the pH, indicating that the water was able to neutralize the acid. However, adding ten drops of acid rain to water from Upper Kintla Lake caused the pH to change from 7.5 to 5.2, indicating that the water was not able to neutralize the acid.

Answer 2

Hypothesis; The effects of adding acid rain to the two different lakes hence there is a significant difference.

Independent Variable: Adding Acid Rain
Levels: Adding Acid Rain
Dependent Variable: pH value of the lakes

Results: There is a significant difference between the effects of adding acid rain to two lakes.