At certain temperature , the H+ ion concentration of water is 4×10−7 M then the value of Kwat the same temperature is :
2.5 mL of 25M weak monoacidic base (Kb=1×10−12) at 25oC is titrated with 215M HCl in water at 25oC. The concentration of H+ at equivalence point is (Kw=1×10−14 at 25oC)