What is the pH of a solution prepared by dissolving 4.1g of HCl

could you please help me answer these questions?1.)What is the pH of a solution prepared by dissolving 4.1g of HCl in water to make 455mL of HCl solution?2.) A volume of 100mL of a 0.900M HNO3 solution is titrated with 0.600M KOH. Calculate the volume of KOH required to reach the equivalence point.3.) Identify the acid (proton donor) for the reactants in the following reaction:HI(aq) H2O(l)?H3O (aq) I-(aq)