Give one example each of the following (i) a strong base (ii) a weak base
Answers
Answer:
(i) a strong base – Sodium hydroxide
(ii) a weak base – Ammonium hydroxide
Explanation:
A base is a compounds that dissociates in solutions to give negatively charged oxide or hydroxyl ions. A base is said to be strong when it readily and completely dissociates to give ions in solution. Strong bases have a pH value between pH 10 – 14.
A weak base on the other hand only partially dissociates to give ions in solution. Weak bases have a pH value between pH 7.3 – 10.
Sodium hydroxide is a strong base as it readily dissociates into Na+ and OH- ions.
Ammonium hydroxide however does not dissociate easily.
Potassium hydroxide - strong base
Ammonium hydroxide - weak base
Explanation:
A strong base will completely dissociate in an aqueous solution. These compounds ionize in water and yield one or more hydroxide ion (OH-) per molecule of base.
Strong bases react with strong acids to form stable compounds. Strong bases will have pH value between 10 and 14. Potassium hydroxide is a strong base as it readily dissociates into K+ and OH- ions.
In contrast, a weak base only partially dissociates into its ions in water. Weak bases will have pH value between 7.3 and 10. Ammonium hydroxide is a weak base as it does not dissociate completely into ions.
