Cobalt Copper Ferric Ferrous. Lead Magnesium Manganese Mercuric Mercurous. . . . . . . WW WW wwwwwwwww A AWA W WW W WWAWWA WWWAA AI WWA WWXWWWXAAX X W WAWWA AWWA AAWA WXAWX AAXWAAAI A WWA WWWA W WAAAWA WWAWWX AWAA X I A, insoluble in water, soluble in either HCl or HNO, or in both. I, insoluble in water and in acids. X, slightly soluble in water and slightly or readily soluble in acids. APPENDIX B INFORMATION REGARDING APPARATUS AND CHEMICALS The lists following include the apparatus and chemicals required for the experiments in this notebook. It is always best to furnish each student with as complete an outfit as possible and to hold him responsible for the same. Certain pieces may, however, be used in common by a number of students, and these have been placed in a separate list. It is always cheapest to purchase the apparatus and chemicals in as large quantities as possible. The amounts of most of the chemicals needed for a class of ten are so small that the cost of the same will be proportionately much greater than when larger quantities are ordered. It is always best to order the definite amounts of chemicals listed in the catalogues, such as 100 g. or 1 lb.; otherwise the cost of weighing out odd quantities and preparing these for shipment may amount to more than the cost of the chemicals. The supplies may be obtained from any of the large dealers. Catalogues will be sent on application and should be in every school. The following are the addresses of some of the largest firms: Central Scientific Company, 412 Orleans St., Chicago, Ill. Eimer and Amend, 205 Third Avenue, New York City. Arthur H. Thomas Company, West Washington Square, Philadelphia, Pa. E. H. Sargent & Co., 145 Lake St., Chicago, Ill. A list of the supplies needed should be sent to a number of firms for quotations on prices. In ordering any piece of apparatus a certain form in some catalogue should be designated; otherwise it will be impossible to compare the prices. In general it is best to purchase as simple a form of apparatus as possible; for example, 20 cents will buy a Bunsen burner which for ordinary purposes is preferable to those costing $1. In the case of large orders a considerable saving may be made by placing the order four or five months early and requesting the dealer to import duty free such articles as can in this way be obtained at a less cost. A much higher price will have to be paid for small orders placed for immediate delivery. A person experienced in the purchase of supplies will always find it possible to reduce materially the cost of the order. APPARATUS REQUIRED FOR EACH STUDENT (TO BE KEPT IN STUDENT'S LOCKER) Beakers, nest of 7 (100-cc. to 700-cc.). Blowpipe, mouth. Bottle, narrow-necked, 1000-cc. (Fig. 25, B). Bottles, wide-mouthed: 1 (60-cc.); 5 (250-cc.). Burner, wing-top, for bending glass tubing (Fig. 10). Calcium chloride drying-tube, straight, 15 cm. in length (Fig. 19, B). Charcoal, 1 piece 8 cm. x 3 cm. Deflagrating-spoon. Dish, lead, diameter about 6 cm., depth 3 cm. Evaporating-dish, diameter 7 cm. File, round, about 15 cm. in length. File, triangular, about 15 cm. in length. Filters, 25, diameter about 11 cm. Flasks: 2 (250-cc.); 1 (500-cc.). Funnel, diameter about 6.5 cm. Funnel tube, external diameter of tube 6 mm. Glass tubing, 200 g., soft, external diameter 6 mm., walls 1 mm. thick. Glass tubing, hard, internal diameter 1 cm., 1 piece 30 cm. in length. Glass tubing, hard, internal diameter 6 mm., 1 piece 20 cm. in length. Glass rod, diameter 3 mm., 1 piece 15 cm. in length. Glass rod, 1 piece 10 cm. in length. Mortar (diameter about 8 cm.) and pestle (both of porcelain). Pipe-stem triangle, for holding porcelain crucible (Fig. 2). Platinum wire, small (No. 28), 8 cm. long, for flame tests. Retort, glass-stoppered, 150-cc. (Fig. 30). Rubber tubing, internal diameter 6 mm., 1 piece 50 cm. in length. Rubber tubing (soft), pure gum, internal diameter 5 mm., 1 piece, 60 cm. in length, for connections, etc. Splints (ordinary cigar lighters), 125. Sponge. Stopper, rubber, one-hole, to fit hard-glass test tube. Stopper, rubber, two-hole, to fit wide-mouthed 250-cc. bottle. Test tubes, 12, length 12 cm., diameter about 1.7 cm. Test-tube brush. Test-tube rack. Towel. Watch glass, diameter about 8 cm. Window glass, 4 pieces 10 cm. square. Wire gauze, 2 pieces 12 cm. square. APPARATUS TO BE LEFT ON EACH DESK Bunsen burner, with 75 cm. of rubber tubing to fit. Iron tripod (Fig. 31). Pneumatic trough (Fig. 18). The trough should be about 12 to 15 cm. deep, and large enough to hold 4 or 5 wide-mouthed bottles (250-cc.). It may be round or rectangular. A pan made of granite ware or an earthen crock serves well, or any tinsmith can readily make suitable troughs of galvanized iron. Ring stand and 3 rings. REAGENTS ON EACH DESK 250-cc. bottles filled with the reagents named below. The bottles containing the sodium hydroxide should have ordinary corks, the others should be glass-stoppered. Ammonium hydroxide (density 0.90). Hydrochloric acid (density 1.2). Nitric acid (density 1.4). Sodium hydroxide solution (10 g. in 100 cc. of water). Sulfuric acid (density 1.84). *2 sets apparatus for testing conductivity of solutions (Fig. 53, p. 103, "First Course in Chemistry"); this may be purchased of supply houses. 1 balance, weighing from 0.5 g. to 500 g., with accompanying weights. 2 balances, sensitive to 1 cg. and made to carry a load of 100 g. 1 barometer. 1 bottle or flask, 2000-cc. (Fig. 40, A). 4 burettes, 50-cc., graduated in 0.1 cc. (Fig. 28). 5 pieces cobalt glass 10 cm. square (for flame tests). *4 condensers, Liebig (Fig. 25, B, p. 42, "First Course in Chemistry”), with rubber tubing and large clamp. 2 sets cork-borers (6 in a set). 2 gross corks, best grades, sizes 7, 8, 9, 10, and 12. 1 cylinder, glass, about 30 cm. in length and 4 to 5 cm. in width. 1 cylinder, graduated, 200-cc. 1 cylinder, graduated, 500-cc. 1 distilling apparatus for preparing distilled water. *2 flasks, holding 100 cc. when filled to point marked on neck (Fig. 41, C). *1 hydrometer, reading from 0.900 to 1.000. 1 magnifying-glass, small. *1 microscope, eyepiece 1 inch, objectives and . 5 thermometers, graduated from - 10° to +150°C. 2 tubes, graduated in cubic centimeters, 50 cm. in length and about 2 cm. in width. 2 sets weights, 1 cg. to 50 g., in covered wooden box. CHEMICALS ON REAGENT SHELF (FOR USE OF ALL STUDENTS) The bottles containing solutions should be glass-stoppered. Gummed letters of the alphabet, of different sizes, may be obtained at little cost from any stationer, and these may be used in making the labels for the bottles. If the class is small, bottles holding 250 cc. will ordinarily serve; if the class is large, then it is better to use bottles holding at least 500 cc. A few of the reagents, such as limewater, are used so extensively that it is better to use a 1000-cc. bottle. Distilled water must be used in making all solutions. A 10% solution signifies 10 g. dissolved in 100 cc. of water. 1 Apparatus marked by a star (*) is desirable but not necessary unless all optional experiments are performed. |