If you dilute 15.0 mL of 1.75 M hydrochloric acid to 500. mL, what is the molar concentration of the dilute acid? Molar concentration = Submit Answer Try Another Version 3 itern attempts remaining Solution We use M1V1=M2V2 M1=1.75M V1=0.015L V2=0.5 L M2=1.75*0.015/0.5=0.053M Molar concentration is 0.053 M.