Question

Aquatic animals have different levels of tolerance to pH scale changes in water. For example a wood frog will die if the pH of water falls below 4while a clam will die if the pH of water falls below 6 what can you conclude about the acidity of water in a river if both wood frogs and clams survive?

Answer 1

We can assume that the acidity of the river has a pH value of at least 6 or greater. We know this because given that clams die if acidity is less than 6 and frogs die when acidity is less than 4, if they both survive, acidity must not be lower than 6 pH