Question

The molar Concentration of aqueos solution of HCl having pH=2 is ???

Answer 1

HCl is HYDROCHLORIC ACID and results a VERY STRONG ACID because It takes part to ionic dissociation in aqueous solutions TO GIVE HYDRONIUM IONs (e.g. H3O+)

HCl(aq) + H2O(aq) ---> H3O+(aq) + Cl-(aq)

Now, We may assume that

|HCl| = |H3O+| = 2 M

Here, We need to assume that all the acid will dissociate into its ionic state!

So, Concentration of H+ ions = 2.0 M

pH=−log[H+]

Log (2) = 0.301

pH = - log = - 0.301 (VERY highly acidic)