Question

what is the strongest and week base​

Answer 1

Answer

the strongest base is

1) sodium hydroxide

2) potassium hydroxide

3) calcium hydroxide

and

the week base is

1) Ammonia

I hope thes answer can help you

Answer 2

A strong base is something like sodium hydroxide or potassium hydroxide which is fully ionic. You can think of the compound as being 100% split up into metal ions and hydroxide ions in solution.

Each mole of sodium hydroxide dissolves to give a mole of hydroxide ions in solution.member that:

Since pH is a measure of hydrogen ion concentration, how can a solution which contains hydroxide ions have a pH? To understand this, you need to know about the ionic product for water.

Explaining the term "weak base"

Ammonia is a typical weak base. Ammonia itself obviously doesn't contain hydroxide ions, but it reacts with water to produce ammonium ions and hydroxide ions.

However, the reaction is reversible, and at any one time about 99% of the ammonia is still present as ammonia molecules. Only about 1% has actually produced hydroxide ions.

A weak base is one which doesn't convert fully into hydroxide ions in solution.

Comparing the strengths of weak bases in solution: Kb

When a weak base reacts with water, the position of equilibrium varies from base to base. The further to the left it is, the weaker the base.

You can get a measure of the position of an equilibrium by writing an equilibrium constant for the reaction. The lower the value for the constant, the more the equilibrium lies to the left.

In this case the equilibrium constant is called Kb