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    Hydrogen selenide production

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    Hydrogen selenide can be prepared by the reaction of aluminium selenide with water, the other product being solid aluminium hydroxide, Al(OH)3. At STP hydrogen selenide gas has a density of 3.61g litre -1.

    Draw a diagram of how to prepare a jar of dry hydrogen selenide, from the reaction between aluminium selenide with water using only a selection of the following equipment and materials. You should assume that the equipment may be clamped in any position. Include a brief description of how the arrangement achieves the desired result.

    Liquids Solids
    Concentrated hydrochloric acid Calcium chloride granules
    Concentrated nitric acid Sodium chloride
    Water Aluminium selenide
    Sodium hydroxide

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