100% dissociation isn't true as solutions become more concentrated. If the acid is 100% dissociated in solutions of 1.0 M or less, it is called strong. Sulfuric acid is considered strong only in its first dissociation step.
H2SO4 → HSO4- + H +
A weak acid only partially dissociates in water to give and the anion. Examples of weak acids include hydrofluoric acid, HF, and acetic acid,
Weak acids include:
Molecules that contain an ionizable proton. A molecule with a formula starting with H usually is an acid
Organic acids containing one or more carboxyl group, -COOH. The H is ionizable
Anions with an ionizable proton. (e.g,HSO4- → SO4 + H+ )
Cations: transition metal cations, heavy metal cations with high charge
NH4+ Dissociates into NH3+
Strong bases dissociate 100% into the cation and OH+ (hydroxide ion). The hydroxides of the Group I and Group II metals usually are considered to be strong bases
Examples of weak bases include ammonia, NH3 + H+ , and diethyl amine,
Most weak bases are anions of weak acids.
Weak bases do not furnish OH- ions by dissociation. Instead, they react with water to generate OH- ions.
Acids and bases exist as conjugate acid-base pairs. The term conjugate comes from the Latin stems meaning "joined together" and refers to things that are joined, particularly in pairs, such as Bronsted acids and bases
pH predicts the strength of acids and bases
the value of pH ranges between 0 – 14
The strength of various acids and bases is expressed on the pH scale. The pH scale is a 14 point scale, which expresses the strength of an acid or a base in terms of the hydronium ion ( ) concentration
The range from 0 to 14 gives a measurement of comparative strength of acid and base solutions
The strength of acids and bases can be expressed in terms of the concentration of hydrogen ions, i.e., hydronium ions (H3O+) or hydroxyl ions in a solution
Pure water and other neutral solutions have a pH value of 7. A pH value less than 7 indicates that the solution is acidic, and a pH value greater than 7 indicates that the solution is basic