Question

How can we identify strong acid and strong base?

Answer 1

Strong Acids:-
Strong acids completely dissociate in water, forming H+ and an anion. There are six strong acids. The others are considered to be weak acids. You should commit the strong acids to memory:

*HCl - hydrochloric acid
*HNO3 - nitric acid
*H2SO4 - sulfuric acid
*HBr - hydrobromic acid
*HI - hydroiodic acid
*HClO4 - perchloric acid

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; 100% dissociation isn't true as solutions become more concentrated.
H2SO4 → H+ + HSO4



Strong Bases:-
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.

*LiOH - lithium hydroxide
*NaOH - sodium hydroxide
*KOH - potassium hydroxide
*RbOH - rubidium hydroxide
*CsOH - cesium hydroxide
*Ca(OH)2 - calcium hydroxide
*Sr(OH)2 - strontium hydroxide
*Ba(OH)2 - barium hydroxide
* These bases completely

dissociate in solutions of 0.01 M or less.