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

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

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

Explanation:

  • Conductivity: Potassium hydroxide (KOH) is a strong base and dissociates completely in solution, producing a high concentration of OH⁻ ions, which contributes to high conductivity. Ammonia (NH₃) is a weak base and does not dissociate completely, resulting in lower conductivity.

  • Concentration of Solute: The concentration of solute cannot be determined solely based on the nature of the base (strong vs. weak) without specific concentrations being mentioned.

  • pH: KOH generally has a higher pH than ammonia due to its complete dissociation; however, the exact pH comparison will depend on the concentrations of each solution.

  • OH⁻ Ions: KOH will always produce a greater quantity of OH⁻ ions in solution when compared to ammonia for equal concentrations because KOH fully dissociates while ammonia only partially dissociates and produces OH⁻ through a different equilibrium reaction.

Thus, the statement regarding the number of OH⁻ ions is the most universally correct.