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a 15.00 ml 15.00 ml sample of h c l hcl of unknown concentration is titrated with 1.5 m n a o h 1.5 m naoh. phenolphthalein is used as an indicator. what is the concentration of the h c l hcl if the solution remains a slight pink color after 10.00 ml 10.00 ml of n a o h naoh is added?

Answer :