Laboratory exercises from the "Essentials of chemistry," - John Charles Hessler, Paperback

• Release Date   5/19/2012
• ISBN-13   9781236252418 | 978-1-236-25241-8
• ISBN   1236252411 | 1-236-25241-1
• Format   Paperback
• Author(s)   John Charles Hessler
• This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...to the air. Result? Conclusion? The brown liquid obtained in c contains a compound of ferrous sulphate and nitric oxide (FeS04.N0). See Experiment XXXIV, /, where the formation of a brown ring of this compound was used as a test for nitric acid and the nitrates. g. Pour 25 c.c. of the solution (its color?) left in the generating flask into a beaker, add any unused copper, and let the beaker stand (in a gas chamber if possible) until all action ceases. There should be an excess of copper. Pour the liquid into an evaporating dish, and evaporate on a wire gauze to about 10 c.c. Dip into the liquid a glass rod, and see if the liquid which sticks to the rod will solidify on cooling. If so, let the dish cool. if not, evaporate off about 2 c.c. more, and try again. Result? The substance obtained is cupric nitrate, Cu(N03)2. Write the partial and complete equations. EXPERIMENT XXXVIII. NITROUS OXIDE. Apparatus.--Test tubes, stopper, delivery tube, pneumatic trough, clamp, ring stand, collecting bottle. Materials.--Ammonium nitrate, pine splinter. a. Into a test tube provided with stopper and delivery tube put about 10 grams ammonium nitrate, and fasten the test tube by a clamp to the ring stand. The test tube should be inclined at an angle of about forty-five degrees. Invert a bottle of water (best warm) in the pneumatic trough, but do not put the delivery tube into the water until c. b. Heat the test tube gently with a moving flame. Result? Warm more. Result? When a steady stream of gas is evolved, hold over the end of the delivery tube a cold and dry beaker. What collects in it? c. Now put the end of the delivery tube into the pneumatic trough, and fill the collecting bottle with the gas. The gas is nitrous oxide, N20. Write the equation. Set the bottle of gas mo...