Exp9TPManual.pdf - AP Chemistry By Satellite Laboratory...

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AP CHEMISTRY BY SATELLITE 9 - 1 INSTRUCTOR LAB MANUAL AP Chemistry By Satellite Laboratory Manual Instructor's Edition EXPERIMENT 9: SOLUBILITIES Contents Page Reagents ........................................................................... 9-2 Equipment ........................................................................ 9-4 Useful Experimental Comments .......................................... 9-5 Pre–laboratory Questions ................................................... 9-7 Experimental Write–up ..................................................... 9-8 Post–laboratory Questions ................................................. 9-20 Instructor Evaluation Sheet ............................................... 9-21
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AP CHEMISTRY BY SATELLITE 9 - 2 INSTRUCTOR LAB MANUAL Reagents CHEMICAL Quantity CHEMICAL Quantity ammonium chloride 0.50 g potassium nitrate 0.50 g ammonium nitrate 0.50 g silver nitrate 0.50 g barium nitrate 0.50 g sodium acetate trihydrate 0.50 g barium sulfate 0.50 g sodium bromide 0.50 g calcium nitrate tetrahydrate 0.50 g sodium carbonate 0.50 g copper (II) carbonate 0.50 g sodium chloride 0.50 g copper (II) nitrate trihydrate 0.50 g sodium hydroxide 0.50 g lead (II) nitrate 0.50 g sodium nitrate 0.50 g potassium chloride* 0.10 g sodium sulfate 0.50 g deionized water ~100 mL Solids should be provided to students in vials with microspatula caps. Wrap the vial containing silver nitrate with electricians tape to protect it from light. All samples should be crushed into small crystals before placing into vials. Remember, the crystals must fit into the wells of the 96–well plate. Deionized water may have to be used for preparing solutions and dissolving solids in this experiment. The concentration of chloride ion in deionized water may be enough to cause precipitation of silver chloride. *These solids are used only in the preparation of the unknown. A labeled waste container is needed for the following reagents; barium nitrate barium sulfate cupric carbonate cupric nitrate lead nitrate silver nitrate
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AP CHEMISTRY BY SATELLITE 9 - 3 INSTRUCTOR LAB MANUAL Unknown Preparation Unknowns should be provided to the students in groups of four 13 x 100 mm test tubes. The group of tubes should be labeled with an identification number and a list of all the ions found in the group. All solutions used should be 0.1M. Approximately 5 mL of each unknown should be sufficient for identification. Suggested unknown combinations: Test Tubes Unk. #A B C D List of ions 1 Na 2 SO 4 AgNO 3 NaCl Cu(NO 3 ) 2 Na + ,Ag + ,Cu 2+ ,SO 4 2- ,NO 3 - ,Cl - 2 Cu(NO 3 ) 2 Pb(NO 3 ) 2 Na 2 CO 3 NaCl Cu 2+ ,Pb 2+ ,Na + ,NO 3 - ,CO 3 2- ,Cl - 3 Ba(NO 3 ) 2 AgNO 3 Cu(NO 3 ) 2 NaOH Ba 2+ ,Ag + ,Cu 2+ ,Na + ,NO 3 - ,OH - 4 AgNO 3 NaOH Na 2 SO 4 Na 2 CO 3 Ag + ,Na + ,NO 3 - ,OH - ,SO 4 2- ,CO 3 2- 5 KCl Pb(NO 3 ) 2 Cu(NO 3 ) 2 AgNO 3 K + ,Pb 2+ ,Cu 2+ ,Ag + ,Cl - ,NO 3 - 6 Ba(NO 3 ) 2 KCl Pb(NO 3 ) 2 AgNO 3 Ba 2+ ,K + ,Pb 2+ ,Ag + ,NO 3 - ,Cl - Solution Preparation: Use values from the table below to prepare the solutions of the salts needed in this experiment. (See Appendix I & III. for more detail.) Multiply both weight and volume columns by the number of students in the class to determine the total mass of salt required and to obtain the total amount of solution required.
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