sulfuric Acid 44. The Preparation and Properties of Hydrogen Fluoride. 47. The Preparation and Properties of Iodine and of Hydro- 58. Arsenic and Some of its Compounds . 59. A Study of Some of the Properties of Antimony. 66. The Determination of the Weight of Common Salt ob- DIRECTIONS A list of the apparatus and chemicals necessary for performing the experiments, together with suggestions as to their purchase, is given in Appendix B. It is expected that each desk will be provided with five of the most common reagents (see Appendix, p. 141). When reference is made to any of these five reagents under "materials" required in performing each exercise, it will be understood that the reagents on the desk are the ones to be used. Other reagents used less frequently should be placed on a reagent shelf available to all. The abbreviation (R. S.) used in listing the materials necessary for performing each individual experiment refers to the reagents on the reagent shelf. The abbreviation (R) implies that the equation for the reaction involved in the experiment is to be written. The character (?) implies that the results obtained in that part of the experiment are to be recorded in the notes. The word "hood" signifies that the experiment is to be performed in a wellventilated compartment so that any poisonous gases evolved will be removed at once. All thermometer readings refer to the centigrade scale. Exercises or parts of exercises marked with a star may be omitted if time is not available for performing all the experiments. |