Experimental Inorganic Chemistry

Experimental Inorganic Chemistry

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...dioxide is the weight of the latter. Using the volume of the flask under normal conditions, calculate the weight of the G.M.V. (22.4 1.) and of 1 l. of sulphur dioxide (?). Enumerate carefully all the sources of error to which you should expect this way of determining the density of a gas to be liable (?). In doing this, consider each detail of the operation very critically. 87. Preparation of Sulphuric Acid (Two students working together). Obtain a distilling-flask (25 c.c.), rubber connections for a safety bottle, a screw-clamp, and a Chapman pump from the storeroom. Fit up with your one-liter bottle the apparatus as in Fig. 25. Charge the hard glass tube with about 10 g. of granular pyrite, and place a small, loose plug of asbestos just beyond the pyrite to retain any unburnt sulphur. iPut into the distilling-flask about 10 c.c. of pure concentrated nitric acid. The safety bottle, half filled with water to show the rate at which air is being drawn through the apparatus, is attached to the water pump. The total air admitted is regulated by the screw-clamp ' In case very pure pyrite is not available, it is better to depart from the common manufacturing process by substituting a boat containing a little sulphur. between the pump and the safety bottle, 'while the proportions which pass over the pyrite and which carry over the nitric acid vapor, respectively, are regulated by pinching one of the tubes with the finger and thumb. First heat the pyrite in a very slow stream of air until the sulphur burns. Then warm the nitric acid and, by pinching the tube admitting air to the pyrite-burner, divert part of the air current so that it may carry over a little of the vapor of the acid. Heat the pyrite strongly and continuously. Repeat...
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Product details

  • Paperback | 56 pages
  • 189 x 246 x 3mm | 118g
  • United States
  • English
  • black & white illustrations
  • 1236884515
  • 9781236884510