Sulphuric Acid, Concentrated. gravity 1.84. About 36 N (18 M). Specific Sulphuric Acid, Dilute, 2 N. Specific gravity 1.065. Dilute 59 cc. concentrated sulphuric acid to one liter. Reagents for Special Use Acetic Acid, N. Experiments 62 and 63. Dilute the reagent acetic acid to twice its volume; or dilute 57.1 cc. glacial acetic acid to one liter. Experiment 57. 22 grams 62 grams crys Experiment 57. Aluminium Chloride, N/2 (M/6). crystals, AlCl3. 6 H2O, to one liter. Barium Acetate, N/2 (M/4). tals, Ba(C2H3O2)2. H2O, to one liter. Barium Nitrate, N/2 (M/4). Experiment 57. 65 grams to one liter. Bleaching Powder. Experiments 155-160. Grind 100 grams bleaching powder in a mortar and gradually add about 50 cc. water, so as to form a paste. Add 250 cc. water, mix thoroughly, and filter. Calcium Bicarbonate (Artificial Hard Water). Experiments 6971. Dilute limewater with an equal volume of distilled water. Pass in carbon dioxide until the precipitate formed at first is redissolved. If a little precipitate persists, filter the liquid. Chromic Sulphate, N/2 (M/12). Experiment 151. crystals, Cr2(SO4)3. 18 H2O, to one liter. 60 grams Copper Sulphate for Fehling's Solution. Experiment 98. 17.3 grams crystals, CuSO4. 5 H2O, to one liter. Cyanin. Experiment 148. O.I gram in a mixture of 50 cc. alcohol and 50 cc. water. Elsner's Reagent (Basic Zinc Chloride). Experiment 132. 500 grams zinc chloride. 20 grams zinc oxide 425 cc. water Warm until clear. Ferrous Sulphate, N/2 (M/4). crystals, FeSO4 . 7 H2O, to one liter. Experiment 151. 70 grams Formic Acid, Concentrated. About 36.5 N. Experiment 33. Spe cific gravity 1.22. Formic Acid, N. Experiments 62 and 63. Dilute 37.7 cc. pure formic acid (sp. gr. 1.22) to one liter; or dilute 173.6 cc. formic acid of sp. gr. 1.06 to one liter. Experiments 62 and 63. Hydrochloric Acid, N. Dilute the reagent dilute (2 N) hydrochloric acid to twice its original volume. Hydrochloric Acid, 3 per cent. Experiments 144, 146, 149. Dilute 400 cc. of the reagent dilute (2 N) hydrochloric acid to one liter. Hydrochloric Acid, 0.4 per cent. Experiment 116. 55 cc. dilute (2 N) hydrochloric acid to one liter. Indigo Carmine. Experiment 164. one liter. Löwe's Reagent. Experiment 154. I gram indigo carmine to Dissolve 25 grams copper sulphate and 12 cc. gylcerol in 250 cc. water. Add just sufficient sodium hydroxide solution to redissolve the precipitate formed. Oxalic Acid, Saturated. 120 grams crystals, H2C2O4. 2 H2O, to one liter. Oxalic Acid, 5 per cent. Experiments 146 and 149. 50 grams crystals H2C2O4. 2 H2O to one liter. Pepsin. Experiment 116. 0.1 gram commercial dry pepsin to one liter. Potassium Chloride, N/2. Experiment 57. 37 grams to one liter. Experiment 169. 49 grams Potassium Dichromate, N (M/6). Experiment 169. to one liter. Potassium Hydroxide, 30 per cent. grams to one liter. Potassium Hydroxide, 5 per cent. Experiment 32. 385 to one liter; or dilute the 50 per cent solution to 15 times its volume. Potassium Hydroxide in Alcohol. to one liter alcohol. Potassium Sulphate, N/2 (M/4). one liter. Experiment 82. 100 grams Experiment 57. 44 grams to Richardson's Reagent. Experiment 154. Dissolve 25 grams nickel sulphate crystals, NiSO4. 7 H2O, in 500 cc. hot water. Precipitate with sodium hydroxide solution. Wash thoroughly by settling and decantation. Dissolve in 125 cc. concentrated ammonia (sp. gr. 0.90) and make up to 250 cc. with water. Rosolic Acid. Experiment 147. 0.5 gram in a mixture of 50 cc. alcohol and 50 cc. water. Silver Sulphate, Saturated. 7 grams to one liter. Sodium Bisulphite, 30 per cent. Experiment 168. 385 grams to one liter. Sodium Bisulphite, M. Experiments 157, 158, and 164. 104 grams to one liter; or dilute the 30 per cent solution to three times its volume. Sodium Carbonate, I per cent. Experiment 116 and 144. 10 grams anhydrous sodium carbonate to one liter; or dilute the reagent N. sodium carbonate solution to five times its volume. Sodium Carbonate, 0.05 per cent. Experiment 153. Dilute the reagent sodium carbonate to 100 times its volume. Sodium Chloride, 5 per cent. Experiments 57 and 109. 50 grams to one liter. Sodium Citrate. Experiment 98. 173 grams to one liter. Sodium Sulphate, N/2 (M/4). Experiment 57. 80 grams crystals, Na2SO4 . 10 H2O, to one liter. Sodium Potassium Tartrate for Fehling's Solution. Experiment 98. 346 grams crystals, NaKCHО6 . 4 H2O, to one liter. Sodium Thiosulphate, M./2. Experiment 157. 124 grams crystals, Na2S2O3. 5 H2O, to one liter. Trypsin. Experiment 116. 0.1 gram commercial dry trypsin to one liter. Compare dime = one tenth of a dollar. = ten commandments. Hecto- = one hundred, 100. Compare hectograph = a gelatin pad for multiplying copies of a writing or drawing. 1000 cubic millimeters (mm.3) = 1 cubic centimeter (cm.3 or cc.) 1000 cubic centimeters 1000 liters (milliliters) = I liter = 1 cubic meter (or stere) (m.3) |