English: Gas-volumetric burette: A marks the 100 mL burette; B the Hg containing bulb; C the capillary tube connected to atmosphere; D the three-way stopcock (CO flux); E the 50 mL two-neck Erlenmayer flask (reaction system). Liquid Hg is colored Red and the Yellow meniscus is the same solvent contained in Erlenmayer flask. The apparatus is thermostatically controlled.
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