Acid-Base Chemistry and pH Calculations

Why was the hydrolysis equation for aluminum chloride not written in the previous video?

• It is a neutral compound.

• It is not relevant to the topic.

• It is a very complicated equation.

• It is a very simple equation.

Which of the following ions is considered neutral?

• Iron

• Aluminum

• Chromium

• Chloride

What characteristic do small, highly charged cations share?

• They have no charge.

• They are always neutral.

• They act as bases.

• They act as acids.

What happens to water molecules when they surround an aluminum ion in a salt solution?

• They form a hydration sphere.

• They dissociate completely.

• They form a crystal structure.

• They become neutral.

What is the relationship between Ka and Kb for a conjugate acid-base pair?

• Ka times Kb equals Kw.

• Ka is always greater than Kb.

• Ka is always less than Kb.

• Ka and Kb are unrelated.

What is the value of Kw at 25-degrees Celsius?

• 1.0 times 10 to the minus 21

• 1.0 times 10 to the minus 14

• 1.0 times 10 to the minus 7

• 1.0 times 10 to the minus 10

How do you calculate the Kb of an ion if you know the Ka of its conjugate acid?

• Subtract Kw from the Ka of the conjugate acid.

• Multiply Kw by the Ka of the conjugate acid.

• Divide Kw by the Ka of the conjugate acid.

• Add Kw to the Ka of the conjugate acid.

What is the approximate Kb value for chloride ion?

• 1.4 times 10 to the minus 11

• 7.7 times 10 to the minus 21

• 1.0 times 10 to the minus 14

• 1.3 times 10 to the sixth

Which ion is a relatively stronger base compared to chloride?

• Iron

• Fluoride

• Aluminum

• Chromium

What is the Kb value for fluoride ion?

• 1.0 times 10 to the minus 14

• 1.4 times 10 to the minus 11

• 1.3 times 10 to the sixth

• 7.7 times 10 to the minus 21