Answer: A) weak acid.
Explanation: The strength of an acid or base depends on the degree of ionization in water, the graph shows the ionization of a weak acid.
A strong acid ionizes completely in solution producing excess hydroxonium ions.
A strong base also ionizes to produce excess hydroxyl ions in solutions.
A weak acid does not ionize completely in solutions
A weak base does not ionize completely in solutions.
HA shown in the graph is an acid because as we can see it produces hydroxonium ions in solutions. A base will produce hydroxyl ions.
