What is acids? Give any two examples.
Acids are those chemical substances that gives hydrogen ions when dissolved in water.
For example: HCl -----> H+ + Cl-
H2SO4 -----> 2H+ + SO4--
Sodium hydroxide is a strong base, but ammonium hydroxide is a weak one. Why?
We know, sodium hydroxide is an alkali which produces high concentration of hydroxyl ions in a solution but ammonium hydroxide produces low concentration. So, sodium hydroxide is a stronger and ammonium hydroxide is a weak base.