Answer
Strength refers to the percent of ionization of an acid or base while concentration refers to the number of moles of acid or base per liter of solution,
$HCl$ is a strong acid and can never be described as a weak acid. $HCl$ is concentrated when there is a large number of moles of $HCl$ per liter of solution and dilute when there is a small number of moles of $HCl$ per liter of solution.
Ammonia is a weak base and never a strong base. Ammonia is concentrated when there is a large number of moles of Ammonia per liter of solution and dilute when there is a small number of moles of Ammonia per liter of solution.
A conjugate base of a weak acid a strong base.
Work Step by Step
See textbook definitions.
