Section 3: Strengths of Acids and Bases -Quizizz

What does the strength of an acid or base depend on?

• The volume of the solution

• The temperature of the solution

• The number of acid or base particles that dissociate into ions in water

• The color of the solution

Answer explanation

The strength of an acid or base depends on the number of particles that dissociate into ions in water. More dissociation means a stronger acid or base, while the volume, temperature, and color do not affect strength.

How does a strong acid behave in water?

• It does not ionize at all

• It ionizes almost entirely

• It only partly ionizes

• It evaporates quickly

Answer explanation

A strong acid ionizes almost entirely in water, meaning it dissociates completely into its ions. This is why the correct answer is that it ionizes almost entirely, unlike weak acids that only partly ionize.

What is the difference between strength and concentration?

• Strength refers to the amount of acid or base in a solution, while concentration refers to how strong or weak something is

• Strength refers to how strong or weak something is, while concentration refers to the amount of acid or base in a solution

• Strength refers to the color of the solution, while concentration refers to the temperature

• Strength and concentration are the same

Answer explanation

The correct choice explains that strength indicates how strong or weak a substance is, while concentration specifically measures the amount of acid or base in a solution, clarifying their distinct meanings.

Tags

NGSS.HS-PS1-5

What does pH measure?

• The color of a solution

• The temperature of a solution

• The concentration of H+ ions in a solution

• The volume of a solution

Answer explanation

pH measures the concentration of H+ ions in a solution, indicating its acidity or alkalinity. The correct choice is 'The concentration of H+ ions in a solution'.

What is the pH range of the scale used to indicate the acidity or basicity of a solution?

• 0-20

• 0-7

• 0-10

• 0-14

Answer explanation

The pH scale ranges from 0 to 14, where 0 indicates strong acidity, 7 is neutral, and 14 indicates strong basicity. Therefore, the correct answer is 0-14.

What does a pH lower than 7 indicate?

• A concentrated solution

• A neutral solution

• An acidic solution

• A basic solution

Answer explanation

A pH lower than 7 indicates an acidic solution. The pH scale ranges from 0 to 14, where values below 7 represent increasing acidity, 7 is neutral, and above 7 indicates basicity.

What does a pH of precisely 7 indicate?

• An acidic solution

• A neutral solution

• A strong solution

• A basic solution

Answer explanation

A pH of precisely 7 indicates a neutral solution, meaning it is neither acidic nor basic. Solutions with a pH less than 7 are acidic, while those above 7 are basic.

What happens to a strong base in a solution?

• It evaporates quickly

• It only partly dissociates

• It dissociates completely

• It does not dissociate at all

Answer explanation

A strong base dissociates completely in solution, releasing hydroxide ions (OH-) and resulting in a high pH. This is why the correct answer is that it dissociates completely.

Tags

NGSS.HS-PS1-3

What is the relationship between the concentration of H+ ions and pH?

• The concentration of H+ and pH are the same

• The greater the concentration of H+, the higher the pH

• The concentration of H+ does not affect pH

• The greater the concentration of H+, the lower the pH

Answer explanation

pH is a measure of hydrogen ion concentration. The greater the concentration of H+ ions, the more acidic the solution, resulting in a lower pH value. Therefore, the correct relationship is that a higher H+ concentration leads to a lower pH.

What does a pH greater than 7 indicate?

• A weak solution

• An acidic solution

• A neutral solution

• A basic solution

Answer explanation

A pH greater than 7 indicates a basic solution. The pH scale ranges from 0 to 14, where values below 7 are acidic, 7 is neutral, and above 7 are basic. Therefore, the correct choice is 'A basic solution'.