Bases

Which of the following is true about alkalis?

• Alkalis are insoluble in water.

• Alkalis do not produce hydroxyl ions in water.

• Alkalis are bases that are soluble in water.

• All alkalis are acids.

What is the primary difference between a base and an alkali?

• Alkalis have a higher concentration of hydroxyl ions.

• Alkalis are soluble in water, while bases may not be.

• Bases are always more basic than alkalis.

• Bases are more reactive than alkalis.

Which of the following is an example of a base but not an alkali?

• Sodium hydroxide (NaOH)

• Potassium hydroxide (KOH)

• Ferric hydroxide (Fe(OH)3)

• Calcium hydroxide (Ca(OH)2)

How can the strength of an alkali be determined?

• By its solubility in water

• By the amount of hydroxyl ions it produces in water

• By its color in litmus test

• By its concentration in water

A strong alkali dissociates more than what percentage of its molecules in water?

• 10%

• 30%

• 50%

• 100%

Which of the following describes a dilute alkali?

• An alkali with a high amount of alkali dissolved in water.

• An alkali with a low amount of alkali dissolved in water.

• An alkali that produces a large number of hydroxyl ions.

• An alkali that is highly soluble in water.

How does the concentration of an alkali differ from its strength?

• Concentration is related to the solubility of an alkali.

• Strength is determined by how much hydroxyl ion is produced.

• Concentration affects the dissociation of alkalis.

• Strength refers to the amount of alkali dissolved.

Which of the following is true about the dilution of alkalis?

• Alkalis cannot be diluted with water.

• Dilution of alkalis follows a similar process to the dilution of acids.

• Only concentrated alkalis can be diluted.

• Diluting alkalis is not recommended as it is a dangerous process.

Which of the following solutions would be a weak alkali?

• Sodium hydroxide (NaOH)

• Potassium hydroxide (KOH)

• A solution of sodium hydroxide where less than 30% of molecules dissociate.

• Calcium hydroxide in excess of water.

Which of the following is an example of a base?

• Sodium hydroxide (NaOH)

• Calcium carbonate (CaCO3)

• Ammonia (NH3)

• All of the above