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Ammonia is a weak base. Potassium hydroxide is a strong base. Which statement is correct?(1 point)

Responses

A solution of potassium hydroxide will always have a lesser concentration of solute than a solution of ammonia.
A solution of potassium hydroxide will always have a lesser concentration of solute than a solution of ammonia.

A solution of potassium hydroxide will always have more OH– ions than a solution of ammonia.
A solution of potassium hydroxide will always have more OH– ions than a solution of ammonia.

A solution of potassium hydroxide will always have lesser conductivity than a solution of ammonia.
A solution of potassium hydroxide will always have lesser conductivity than a solution of ammonia.

A solution of potassium hydroxide will always have a lower pH than a solution of ammonia.

1 answer

The correct statement is:

A solution of potassium hydroxide will always have more OH– ions than a solution of ammonia.

Here's the reasoning:

  1. Potassium hydroxide (KOH) is a strong base and fully dissociates in solution to produce a higher concentration of hydroxide ions (OH–) compared to ammonia.
  2. Ammonia (NH3) is a weak base and only partially dissociates to produce hydroxide ions, resulting in a significantly lower concentration of OH– ions compared to a strong base like KOH.
  3. Because of this complete dissociation of KOH and the incomplete dissociation of NH3, a solution of KOH will always contain more OH– ions than a solution of ammonia.

The other statements are incorrect because:

  • The concentration of solute can vary; KOH solutions can have lower concentrations than ammonia solutions depending on how they are prepared.
  • The conductivity of a solution is related to the concentration of ions. A KOH solution would typically have higher conductivity due to more available ions.
  • The pH of a KOH solution will be higher than that of an ammonia solution because KOH is a stronger base.