Standard substances used for complexometric titration

For general information of what the standard substance is and what criteria it should meet, please read the standard substances page.

Remember to use analytical reagents (AR grade) for standards.

EDTA (disodium dihydrogen ethylenediaminetetraacetate) Na₂C₁₀H₁₄N₂O₈ - dry at 120-130°C for 24 hours to get anhydrous salt. Equivalent weight is 336.2063 g.

Calcium carbonate CaCO₃ - dry at 110°C. Equivalent weight 100.0869 g.

Metallic Mg - equivalent weight 24.3050 g.