Practical Chemistry: A Course of Laboratory Work |
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Page 7
... copper until it is red - hot . By means of a pair of bellows pass a very slow stream of air through the U tube and over the hot copper . The copper is soon changed to a black solid quite unlike the original red copper ; this solid is ...
... copper until it is red - hot . By means of a pair of bellows pass a very slow stream of air through the U tube and over the hot copper . The copper is soon changed to a black solid quite unlike the original red copper ; this solid is ...
Page 8
... copper is produced in the tube , and that drops of water are formed in the small flask . Continue the passage of the hydrogen over the hot copper oxide so long as any water seems to be produced , or any change to occur in the appearance ...
... copper is produced in the tube , and that drops of water are formed in the small flask . Continue the passage of the hydrogen over the hot copper oxide so long as any water seems to be produced , or any change to occur in the appearance ...
Page 9
... copper is heated in air it combines with oxygen in the air to produce a new kind of matter called copper oxide ; and that the weight of the copper oxide thus produced is greater than that of the copper from which it has been produced ...
... copper is heated in air it combines with oxygen in the air to produce a new kind of matter called copper oxide ; and that the weight of the copper oxide thus produced is greater than that of the copper from which it has been produced ...
Page 10
... copper underwent are representative of the kind of chemical changes which Elements undergo . An Element is chemically changed by adding to , or combining with , it some kind , or kinds , of matter different from itself ; the product ...
... copper underwent are representative of the kind of chemical changes which Elements undergo . An Element is chemically changed by adding to , or combining with , it some kind , or kinds , of matter different from itself ; the product ...
Page 12
... copper oxide and potassium chromate by pounding the two substances together in a mortar . mixture is yellowish - black . Examine it by a magnifying glass ; you can distinguish black particles ( copper oxide ) , and yellow particles ...
... copper oxide and potassium chromate by pounding the two substances together in a mortar . mixture is yellowish - black . Examine it by a magnifying glass ; you can distinguish black particles ( copper oxide ) , and yellow particles ...
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Common terms and phrases
acetic acid alcohol alkali allow to cool ammonia ammonium carbamate ammonium chloride apparatus aqueous solution atomic weight barium barium oxide basin beaker boiling bottle bulb Bunsen-lamp calcium carbamate carbon dioxide Chap chemical change chromium trioxide colour combined composition compound concentrated sulphuric acid copper sulphate cork crucible crystallising crystals decomposed Demy 8vo determine dilute sulphuric acid dissolve drop ELEMENTARY CHEMISTRY elements equivalent evaporate evolved exit tube experiments ferric chloride ferrous sulphate filter filtrate flask grams H₂O hard glass heat hydriodic acid hydrochloric acid hydrogen hydroxide interact iodide iodine iron liquid litmus magnesium mass mercury metal mixture nitric acid nitrogen obtained oxalic acid oxidised oxygen pass permanganate phosphorus platinum potassium potassium chlorate prepared produced prove pure ratio reacting weight reaction salt shew shewn in Fig solid specific gravity sulphocyanide sulphuric acid temperature trioxide vapour warm wash weight of oxygen zinc
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