During warmer parts of the day, fish will be found in deeper waters of a lake. Which statement best explains this phenomena with respect to the solubility of a gas?

Question

Gases are more soluble at low pressures.


Gases are more soluble at high pressures.


Gases are more soluble at low temperatures.


Gases are more soluble at high temperatures.

Answer 1

The statement that best explains the phenomenon of fish moving to deeper waters during warmer parts of the day is:

Gases are more soluble at low temperatures.

In warmer water, the solubility of oxygen (a critical gas for fish) decreases. As surface temperatures rise during the day, the dissolved oxygen levels in warmer water can drop, prompting fish to seek deeper, cooler waters where oxygen is more soluble and more readily available.

Answer 2

Which of the following correctly lists the substances from highest to lowest pH?


lemon juice, distilled water, milk of magnesia


distilled water, milk of magnesia, lemon juice

lemon juice, milk of magnesia, distilled water


milk of magnesia, distilled water, lemon juice

Answer 3

To correctly list the substances from highest to lowest pH, we consider the typical pH values for each:

• Lemon juice: Typically has a pH of around 2-3 (acidic).
• Distilled water: Has a neutral pH of about 7.
• Milk of magnesia: Usually has a pH around 9-10 (basic).

Based on these values, the correct order from highest to lowest pH is:

milk of magnesia, distilled water, lemon juice.

Answer 4

Which of the following does NOT describe an acid?


It has a sour taste.


It has a pH above 7.


It turns litmus paper red.


It will burn skin.

Answer 5

The statement that does NOT describe an acid is:

It has a pH above 7.

Acids typically have a pH below 7. The other statements are characteristics of acids: they often have a sour taste, turn litmus paper red, and can be corrosive and burn skin.