video tutorial Manganese (III) acetate preparation

Name: video tutorial - Manganese (III) acetate preparation
Uploaded: 2025-12-11T09:03:44.059Z
Duration: 14 min 20 s
Description: Today we're going to prepare a very unusual compound, manganese 3-acetate which has manganese...And now here's 16 grams of sodium carbonate.

Objective: summarize the synthesis of manganese(III) acetate (manganese-3-acetate) from manganese sulfate and related reagents.
Initial steps: manganese(II) sulfate monohydrate is dissolved; sodium carbonate is added to form a manganese carbonate precipitate; the precipitate is filtered, washed, and dried to a pale salmon paste, which is used directly in the next step.
Secondary reaction: manganese carbonate in glacial acetic acid is heated under reflux with excess acetic acid, producing a brown/burnished mixture that eventually crystallizes into light brown crystals (initially resembling manganese(II) acetate) when cooled.
Further processing: the brown liquid re-materializes upon reheating with additional glacial acetic acid; a small amount of dry yeast and permanganate are added at elevated temperature, causing the mixture to turn brown and rise in temperature; after heating and cooling, the mixture is poured, chilled, and stored to promote crystallization and drying.
Isolation and yield: filtration, drying, and desiccation yield a fine light brown powder weighing about 40 g; theoretical yields are 31.5 g (anhydrous) and 36.4 g (dihydrate); the product is expected to contain acetic acid and manganese dioxide as impurities.
Characterization and behavior: the product partially dissolves in cold water, and hot water leads to a brown precipitate; dilute bases and acids (KOH, H2SO4, HCl) alter the color and form precipitates; glow tests with iron chloride suggest a stable brown solution; results align with literature descriptions for manganese(III) acetate, noting instability in aqueous acid/alkali and propensity for hydrolysis; potential use in radical reactions is indicated.