Acid rain and chemical weathering | Exit Quiz | Oak National Academy

Which of the following pH values is normal rainwater likely to be?

• 4

• 9

• 7

• 6

Answer explanation

Normal rainwater has a pH of slightly less than 7, whereas acid rain is more likely to have a pH of ~4.

How does the pH of acid rain compare to the pH of vinegar and oranges?

• The pH of acid rain is higher than the pH of vinegar and citric acid in oranges.

• The pH of acid rain is the same as the pH of vinegar and citric acid in oranges.

• The pH of acid rain is less than the pH of vinegar and citric acid in oranges.

Answer explanation

The pH of acid rain (~pH 4) is higher than the pH of vinegar (~pH 2) and citric acid in oranges (~pH 3).

Name an acid found in acid rain.

Answer explanation

Sulfuric acid, carbonic acid and nitric acid may be present in acid rain.

What is pH?

• The measure of hydroxide ion concentration in a solution.

• The measure of hydrogen ion concentration in a solution.

• A scale of acidity and alkalinity.

• When a solution is neutral.

Answer explanation

pH is the measure of hydrogen ion concentration in a solution.

What is produced when a sedimentary rock containing carbonate compounds reacts with acid in acid rain?

• salt + water

• salt + hydrogen

• salt + carbon dioxide + water

• salt + carbon dioxide + hydrogen

Answer explanation

A carbonate and acid react to produce salt, carbon dioxide and water.

Which of the following are impacts of acid rain?

• Organisms within aquatic food webs dying.

• Corroding human skin.

• Plants dying as they cannot absorb essential nutrients.

• Holes forming in plastic outdoor equipment.

• Chemical weathering of rocks.

Answer explanation

Acid rain can cause the following effects: organisms within aquatic food webs dying, plants dying as they cannot absorb essential nutrients and chemical weathering of rocks.