A student titrated 50 cm of sulphuric acid (H2SO4)of an unknown concentration in a flask with sodium hydroxide (NaOH). The acid required 30 cm3 of 0.500 mol/dm3 NaOH to reach the end point H2SO4(aq) + 2NaOH(aq) Na2SO4(aq) + 2H2O() Calculate the concentration the acid. Concentration = mol/dm3
No. of mol. of NaOH used: (30/1000)*0.5= 0.015mol Mole ratio of NaOH:H2SO4= 2:1 No. of mol. of H2SO4: 0.015/2= 0.0075mol Conc. of acid= 0.0075/(50/1000)= 0.15moldm^-3
