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Inside this Book – Weigh into a clean porcelain crucible 1 gm. of dry calcium carbonate. Place the crucible upon a pipeclay triangle fixed on a tripod (see Fig. 16), and heat the crucible by a Bunsen flame, gently at first, and finally to bright redness. The lid should not be on, so that the gaseous COg may escape readily. When the contents have been heated to bright redness for twenty minutes, remove the burner. Allow the crucibl.e to cool somewhat, and while still hot, place it in a desiccator to finish cooling. Weigh when quite cold, and calculate the percentage loss which the carbonate undergoes when it de- composes into quicklime and carbon dioxide.
Inside this book –Practical Chemistry for Engineering Students PDF Book by Arthur James Hale – In the neighbourhood of – 190° C, air is a liquid, and if the temperature is allowed to rise gradually, the nitrogen, which is more volatile, boils off at – 193° C. The liquid oxygen’ left behind in the distilling vessel does not boil off until the temperature has risen to – 182’5° C. Exp. 5. To Prove that the Busting of Iron is only a Special Case of Slow Oxidation. Take the glass tube used in Exp. 3 (p. 27), tip into it as much of damped iron filings as will well cover a penny piece. Insert the rubber cork securely, and shake the tube so that the filings become distributed over the inner surface. Leave this for twenty-four hours, and then examine. Notice that the filings have acquired the reddish colour of rust.
Practical Chemistry for Engineering Students by Arthur James Hale PDF : eBook Information
- Full Book Name – Practical Chemistry for Engineering Students
- Author of this Book – Arthur James Hale
- Language – English
- Book Genre – Nonfiction, Chemistry,
- Download Format – PDF
- Size –
- eBook Pages – 220
- Price – Free