CBSC Science

 I) What happens to an Acid  in a Water Solution ? ->  The hydrogen ion produced in the presence of water in HCl. - >The separation of H+ ion from HCl molecules cannot occur in the absence of water.   HCl + H2O --------> H3O+  + Cl- - >Hydrogen ions cannot exist alone but exist after combines water molecules hence H+ (aq) or hydronium ion (H3O+) .   H+ + H2O --------> H3O+ II) What happens to an Base in a Water Solution ? - >Bases generate hydroxide (OH-) ions in water.  Bases which soluble in water are called alkalis .   Examples:-   a) NaOH(s) + H2O(l) --------> Na+(aq) + OH-(aq)  b) KOH(s) + H2O (l) ----------> K+ (aq) + OH- (aq)  c)  Mg(OH)2 (s) + H2O (l) ----------> Mg2+(aq) +2OH- (aq) III) Process of mixing of Acid or a Base with Water. - >The process of dissolving an acid or a base in water is a exothermic process .  - >We must take care when doing this process. Like mixing of c...