20 cm3of h2so4 reacts with 50cm3 of naoh from 1000cm 3 of a solution of naoh . the naoh solution was added 150cm 3 of water and its concentration became 1.12 mol/dm3 after adding to the remainder of naoh left . determine, with working , what was the concentration of HCl in mol/dm3 and g/cm3
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