Quarterly Exam Review

Front

Main factors affecting solubility:

Back

Temperature, pressure, nature of solute/solvent, presence of other substances.

Answer explanation

The solubility of a substance is primarily influenced by temperature, pressure, the nature of the solute and solvent, and the presence of other substances, making this the correct choice.

Front

pH scale measures acidity/alkalinity.

Back

Acidity or alkalinity of a solution.

Answer explanation

The pH scale specifically measures the acidity or alkalinity of a solution, indicating how acidic (low pH) or basic (high pH) a solution is. This makes the second choice the correct answer.

Front

Calculate concentration of a solution.

Back

C = n / V

Answer explanation

To calculate concentration, use the formula Concentration (C) = Amount of solute (n) / Volume of solution (V). This correctly relates the amount of solute to the total volume of the solution.

Front

Difference between miscible and non-miscible liquids

Back

Miscible liquids mix completely; non-miscible liquids do not mix.

Answer explanation

Miscible liquids mix completely, meaning they can form a homogeneous solution, while non-miscible liquids do not mix and remain separate, forming distinct layers. This is the key difference between the two types of liquids.

Front

Effect of temperature on solid solubility in liquids

Back

Increased temperature generally enhances solid solubility.

Answer explanation

Temperature generally increases the solubility of solids in liquids because higher energy allows more solute particles to dissolve, overcoming the forces holding them together.

Front

Effect of adding acid on solution pH

Back

pH decreases.

Answer explanation

When an acid is added to a solution, it increases the concentration of hydrogen ions (H+), which lowers the pH. Therefore, the correct answer is that the pH of the solution decreases.

Front

Role of water in neutralization reaction?

Back

Produced as a byproduct of the acid-base reaction.

Answer explanation

In a neutralization reaction, an acid reacts with a base to form water and a salt. The correct choice highlights that water is produced as a byproduct, which is a key characteristic of this type of reaction.

Front

Determining if a solution is saturated:

Back

Additional solute does not dissolve.

Answer explanation

A solution is saturated when it can no longer dissolve additional solute. This means that any extra solute added will remain undissolved, indicating the solution has reached its maximum solubility.

Front

Significance of pH 7 on the scale?

Back

Neutral solution.

Answer explanation

A pH of 7 signifies a neutral solution, meaning it is neither acidic nor basic. This is the midpoint on the pH scale, where concentrations of hydrogen ions and hydroxide ions are equal.

Front

Solubility refers to the ability of a substance to dissolve in a solvent.

Back

Solubility

Answer explanation

Solubility refers to the ability of a substance to dissolve in a solvent, making it the correct choice. The other options describe different processes or properties unrelated to solubility.