an unknown molarity of HCl acts as an analyte.50mL of it is placed into a conical flask ans a 0.1M of solution of NaOH was used as a reagent. The endpoint is pH=7, with a pKa of 6.5 chosen.The colour of the solution changed when 10mL of 0.1012M NaOH WAS ADDED..CALCULATE THE Number of moles of of HCl added during titration and its molarity