The chemistry of plant and animal life . (6)What product was formed when the splinter was burned? (7)What caused the sulfur to burn ? (8) What product was formedwhen the S was burned ? (9) Why do these materials burn differ-ently in O than in air? (10) What caused the iron to burn, andwhat was formed ? (11) Is O combustible ? (12) Is O a supporterof combustion ? (13) What compounds are always formed by theunion of O with an element? (14) Give the properties and char-acteristics of O as observed from this experiment. The oxygen in potassium chlorate is not held in firm chemicalcombination, and
The chemistry of plant and animal life . (6)What product was formed when the splinter was burned? (7)What caused the sulfur to burn ? (8) What product was formedwhen the S was burned ? (9) Why do these materials burn differ-ently in O than in air? (10) What caused the iron to burn, andwhat was formed ? (11) Is O combustible ? (12) Is O a supporterof combustion ? (13) What compounds are always formed by theunion of O with an element? (14) Give the properties and char-acteristics of O as observed from this experiment. The oxygen in potassium chlorate is not held in firm chemicalcombination, and when the substance is heated, first a portion, andfinally all of the oxygen is given off. The manganese dioxid isused because of its physical action upon the potassium chlorate, Fig. 15.—Testing oxygenwith burning splinter. 34 AGRICULTURAL CHEMISTRY enabling the oxygen to be given off more easily. The changewhich takes place is exj^ressed by the equation: KCIO3 = KCl + products of the reaction are potassium chlorid and Fig. 16.—Preparation of oxygen, using sink in place of pneumatic oxygen is collected in the cylinders, while the potassium chlo-rid remains with the manganese dioxid in the test-tube. 37. Properties of Oxygen.—Physically considered,oxygen is a colorless, odorless, and tasteless gas, about16 times as heavy as hydrogen. It is slightly soluble inwater, and, when subjected to a low temperature and ahigh pressure, it is liquefied. Chemically, oxygen uniteswith all common elements to form oxids. It is not com-bustible, but is a supporter of combustion. When theburning splinter was thrust into the cylinder of oxygen,the carbon and hydrogen of the wood united with theoxygen in the cylinder, forming carbon dioxid and substances unite with oxygen they are oxidized,that is, oxygen is added to the material. An oxid is acompound of oxygen and any other element. When sul-fur is burned, it unites with oxygen, forming sulfur di- OXYGEN
Size: 2040px × 1225px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorklondonthema
