Question

Acid strength and acid concentration represents:

• A. degree of dissociation and amount dissolved respectively
• B. amount dissolved and degree of dissociation respectively
  
• C. degree of dissociation and valency respectively
• D. none of the above

Answer 1

The correct option is A degree of dissociation and amount dissolved respectively

Acid Strength refers to the degree of dissociation ( or ionization) in an aqueous solution. The greater the number of ions dissociated, or the number of cations and anions released in solution, the stronger the acid. Thus, hydrochloric acid dissociates completely into $H^{+}$ and $C{l}^{-}$ ions in solution, so it is very strong. Acetic acid $\left(C{H}_{3}COOH\right)$, dissociates feebly and releases few ions in solution, so it is a weak acid.
Acid Concentration represents the amount of acid dissolved in a solvent. It is measured in molarity ( the number of moles of acid in 1 L of acid solution), parts per million or percentage. The concentration is a ratio of the solute to solvent content of a solution. Acidic solutions with low numbers of acidic molecules/ions in solution are called dilute solutions whereas those with high numbers of acidic molecules/ions are called concentrated solutions.