The Ammonium Dichromate Volcano

    Description A small conical heap of orange ammonium dichromate is ignited. It sparks and produces a large volume of green chromium (III) oxide as well as steam, resembling a volcano. Apparatus Bunsen burner, heatproof mat. Metal tray such as a large tea tray. Watch glass. Bell jar (optional). One 1L conical flask (optional). One 250mL conical flask...
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    A COLOURFUL DEMONSTRATION OF THE HENDERSON-HASSELBALCH EQUATION

    M.A. HOOPER School of Chemistry, University of Sydney, NSW,2006 The reaction of dry ice, CO 2 (s), with water or dilute sodium hydroxide solution has long been used to demonstrate the colours of universal indicator. The bubbling and clouds of condensing water vapour make it popular with students. By increasing the concentration of the sodium hydrox...
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