Calculation
Na2CO3(aq)+H2SO4(aq)→Na2SO4(aq)+H2O(l)+CO2(g)
Since Na2CO3: H2SO4 = 1:1
No of mol in H2SO4 = 0.1 x (25/1000)
= 2.5 x 10-3 mol
Then the concentration of H2SO4 = (2.5 x 10-3 ) / (4.63/1000) = 0.5399M
Discussion
During the experiment ,there may be some possible error and some of them can be minimized. First, the water inside the burrete may affect the concentration of sulphuric acid. To prevent this , we need to rinse the burrete with sulphuric acid. Also , we need to make sure the top of burrete is filled of s sulphuric acid.
Simiarly , the pipette should be rinsed with the sodium carbonate solution before. Also, our eye level should be horizontal to that of the water level so that the data recorded will be more accurate.
And there are also a precaution during the experiment. Gloves and safety goggles should be weared to prevent the acid contact with our bodies.
After doing the experiment , I think some improvements can be made. During titration , I find that the sodium carbonate solution contain some white solid. And they are probably the undissolved sodium carbonate. In order to solve this problem , next time before the titration begins, strring the sodium carbonate solution is necessary.
Conclusion
The concentration of the sulphuric acid is 0.539M.
