Accurately determine calcium content using our Permanganometry Calculator. This tool simplifies calculations for calcium oxalate precipitation and subsequent titration with standardized potassium permanganate, crucial for analytical chemistry and quantitative analysis in various samples.
Formula:
The estimation of calcium by permanganometry involves precipitating calcium as calcium oxalate, then dissolving the oxalate and titrating it with a standardized potassium permanganate solution. The balanced reaction is:
- 2MnO4- + 5C2O42- + 16H+ → 2Mn2+ + 10CO2 + 8H2O
From the stoichiometry, 2 moles of KMnO4 react with 5 moles of C2O42-, and since calcium precipitates as CaC2O4, 1 mole of C2O42- is equivalent to 1 mole of Ca2+.
Thus, Moles of Ca = (5/2) × Moles of KMnO4
The formulas used in this calculator are:
Mass of Calcium (g) = (MKMnO4 × (VKMnO4 / 1000)) × (5/2) × MWCa
% Calcium = (Mass of Calcium / Wsample) × 100
Where:
- MKMnO4: Molarity of Potassium Permanganate solution (mol/L)
- VKMnO4: Volume of Potassium Permanganate solution used (mL)
- MWCa: Molar Mass of Calcium (40.078 g/mol)
- Wsample: Weight of the original sample (g)