Sodium Methoxide (0.1M)
Molecular formula: NaOCH3
Molecular weight: 54.02
Preparation: Cool 150 mL of anhydrous methanol in ice water and add a small portion of 2.5 g of freshly cut sodium. After the complete dissolution of the metal, add anhydrous toluene to produce 1000 mL. Store the solution in a container well protected from carbon dioxide and moisture.
Standardization: Weigh accurately about 0.4 g of benzoic acid, dissolve in 80 mL of dimethyl-formamide, add 0.1 mL thymol blue in dimethyl formamide as an indicator and titrate with sodium methoxide to give blue color as an endpoint. Perform a blank determination and make any necessary corrections.
1 mole of NaOCH3 ≅ 1 mole of benzoic acid
1000 mL of 1M NaOCH3 ≅ 122.12 g of C6H6COOH
1 mL of 0.1M NaOCH3 ≅ 0.01221 g of C6H6COOH
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