Complexometric Titration Chemistry Report

Extract

[...] Complexometric Titration - Chemistry Report - Chemistry Results: a. - VMother(MgSO4) = 10 mL - CMother(MgSO4) = 0.05 mol/L - VDaughter(MgSO4) = 120 mL (since there are 10 mL of MgSO4 and 100 mL of Water and 10 mL of ammonia) The dilution of the MgSO4 solution unfortunately was brought to 120 mL with 100 mL of water added instead of 90 mL, however we can still do the calculations afterwards: The MgSO4 solution has a concentration of 4.16 x 10-3 mol/L. [...]

[...] We thus determined the concentration of the sample in Ca²?, which is 1.28×10?² mol·L?¹, corresponding to a mass of 1.02×10?² g of calcium in the sample analyzed. This TP allowed us to put into practice the EDTA titration method with different colored indicators such as Eriochrome T or even Murexide. We were able to exploit a standardization method and apply the necessary stoichiometric relationships to determine an unknown concentration. Despite an initial dilution error, the results obtained remain consistent and illustrate the robustness of the method. [...]

[...] Conclusion : In this procedure, we first standardized an EDTA solution using a MgSO solution.? due to the dilution having been slightly modified with the addition of 100 mL of water. Despite this experimental error, the calculations allowed for obtaining a final concentration of EDTA, equal to 4.61×10?² mol·L?¹. This standardized solution was then used to titrate an unknown solution containing Ca2+ ions. The different titrations gave reproducible equivalent volumes, which ensures the accuracy of the method. [...]