Question 1

Explain the difference between active and facilitated transport across a cell membrane.

Accepted Answer

The answer of Explain the difference between active and facilitated...

Question 2

Identify which mechanism is involved in the passage of the following molecules or ions across a cell membrane: A)CO₂ B)cholesterol C)Na⁺ (no energy required) D)Cl^- (energy required)

Accepted Answer

The answer of Identify which mechanism is involved in the...

Question 3

Solutions can be a solid, a liquid, or a gas.

Accepted Answer

Solutions can exist in all states of matter: solid solutions (alloys like brass), liquid solutions (salt water), and gaseous solutions (air).

Question 4

A colloid is not a suspension.

Accepted Answer

A colloid is a mixture where one substance of microscopically dispersed insoluble particles is suspended throughout another substance, differing from a suspension where the particles can settle out over time.

Question 5

Because blood is opaque it is a colloid.

Accepted Answer

Blood is not a colloid because it is a suspension of cells in plasma, not a mixture of particles dispersed in a medium.

Question 6

The solubility of a gas increases with temperature.

Accepted Answer

The solubility of a gas in a liquid typically decreases as the temperature increases. This is because increasing temperature provides more energy to the gas molecules, making them less likely to dissolve in the liquid.

Question 7

The solubility of oxygen in water increases with increasing pressure.

Accepted Answer

The solubility of gases in liquids, including oxygen in water, increases with increasing pressure according to Henry's law.

Question 8

NH₄OH is a weak electrolyte.

Accepted Answer

NH₄OH, or ammonium hydroxide, is a weak electrolyte because it partially dissociates into ions in solution.

Question 9

HF is a strong electrolyte.

Accepted Answer

HF (hydrofluoric acid) is considered a weak electrolyte because it does not completely dissociate into ions in solution.

Question 10

C₂H₅OH is a weak electrolyte.

Accepted Answer

C₂H₅OH is not a valid chemical formula, so it cannot be classified as a weak electrolyte or any type of electrolyte.

Quiz 8: Solution Chemistry: How Sweet Is Your Tea