Which of the following is not a strong base?

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Multiple Choice

Which of the following is not a strong base?

The amount of hydroxide the substance contributes to solution determines base strength. Strong bases dissociate completely in water, releasing a lot of OH- and giving a high pH. Substances like KOH, LiOH, and Ba(OH)2 do this, so they’re considered strong bases. Aluminum hydroxide behaves differently. It is sparingly soluble in water and only weakly dissociates, so it doesn’t supply OH- to the solution in large amounts. It’s also amphoteric, meaning it can react with both acids and bases, but that doesn’t make it a strong base. Because of its limited dissolution and weak basic character, aluminum hydroxide is not a strong base.

The amount of hydroxide the substance contributes to solution determines base strength. Strong bases dissociate completely in water, releasing a lot of OH- and giving a high pH. Substances like KOH, LiOH, and Ba(OH)2 do this, so they’re considered strong bases.

Aluminum hydroxide behaves differently. It is sparingly soluble in water and only weakly dissociates, so it doesn’t supply OH- to the solution in large amounts. It’s also amphoteric, meaning it can react with both acids and bases, but that doesn’t make it a strong base. Because of its limited dissolution and weak basic character, aluminum hydroxide is not a strong base.

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