Laboratory Practice; a Series of Experiments On the Fundamental Principles of Chemistry
Laboratory Practice; a Series of Experiments On the Fundamental Principles of Chemistry
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Transfer to glass combustion tube connected with hydrogen genera- tor as in Ex. 53 (a). Interpose chloride-of-calci- xim tube between generator and combustion tube.
Allow hydrogen to flow through the apparatus long enough to expel the air ; then heat the com- bustion tube, and continue until reduction is com- plete. Test gas evolved from outlet, which should be bent downwards. Preserve silver. Add a few drops of sulphuric acid to blue filtrate and evapo- rate (under hood) to get rid of the vola...tile acids ; dilute to 10 cubic centimetres and insert a strip of zinc.
(1) What is the gas evolved during the reduction?
What is its composition ? What must be the composition of the precipitate ? Does the formation of this precipitate con- form to any general principle — Ex. 14 (3). On what circum- stances does the separation of copper form silver in this ex- periment ? How can you be sure that the copper obtained came from the coin and not from any of the accessory ma- terials employed ?
Ex.
What to read after Laboratory Practice; a Series of Experiments On the Fundamental Principles of Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Josiah Parsons Cooke to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Transfer to glass combustion tube connected with hydrogen genera- tor as in Ex. 53 (a). Interpose chloride-of-calci- xim tube between generator and combustion tube.
Allow hydrogen to flow through the apparatus long enough to expel the air ; then heat the com- bustion tube, and continue until reduction is com- plete. Test gas evolved from outlet, which should be bent downwards. Preserve silver. Add a few drops of sulphuric acid to blue filtrate and evapo- rate (under hood) to get rid of the vola...tile acids ; dilute to 10 cubic centimetres and insert a strip of zinc.
(1) What is the gas evolved during the reduction?
What is its composition ? What must be the composition of the precipitate ? Does the formation of this precipitate con- form to any general principle — Ex. 14 (3). On what circum- stances does the separation of copper form silver in this ex- periment ? How can you be sure that the copper obtained came from the coin and not from any of the accessory ma- terials employed ?
Ex.
What to read after Laboratory Practice; a Series of Experiments On the Fundamental Principles of Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by Josiah Parsons Cooke to read onlineMoreLess
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