Question

In an experiment, a scientist compares the effect of adding acid rain to

Answer 1

Answer: Lake Minnetonka water is buffered instead of Upper Kintla Lake water that doesn´t have molecules to "muffle" the acid rain added.

Explanation:

When Adding Acid or a Base to a sample, and its pH doesn´t change, it will tell us that something is happening and there must be some molecules in the sample that are reacting with the Acid or Base added and that is why, the sample´s pH stay the same. These "molecules" muffle the Acid or Base, and they are called "buffer".

As you can see in the image below, there is an example with a typical Bicarbonate Buffer when adding HCl, the Bicarbonate molecules will react with the HCl, making it to change in other molecule, and losing its acid power.

When the Acid Rain was added to the Upper Kintla Lake sample, the pH changed instantly, because there were any molecule to react with the HCl added and HCl molecules remain the same, making the pH to drop from 7.5 to 5.2

Answer 2

Lake Minnetonka in Southern Minneosta is buffer solution

Explanation:

One can conclude from the observation that Lake Minnetonka is a buffer solution. A buffer solution is a special solution that resist changes in pH or pOH when a small amount of an acid or base is added.

• Buffers are solutions in equilibrium with a fairly constant pH.
• They are  aqueous solutions containing weak acids and their salts or weak bases and their salts.
• Since the pH of water sample from Lake Minnetonka did not change, it is a buffer.

Learn more:

buffer brainly.com/question/4431162

blood as a buffer brainly.com/question/12855542

#learnwithBrainly