Lab Report for Group I Cations

EXPERIMENT 9: GROUP II CATIONS PURPOSE numerical values are not the end all and be all of chemistry experiments. soft observations are equally distinguished as indicators of chemical form and the nature of the reactants participating in a chemical reaction. In this experiment, the focus was on qualitative analysis of the Group II cations, Cu2+, Bi3+, Pb2+, Sn4+ (DePaul University, 89). Through a exhibit of rapidly spinning the solutions in a centrifuge, adding different acids to the solutions, and analyzing the reactions of the rest liquids and precipitates, the qualitative data in this experiment determined the carriage of copper, bismuth, lead, and tin in a known and unknown standard solution. PROCEDURE In the former weeks experiment, the proper molarities of the necessary acids were prepared. The molarities of these acids embarrass: 6 M HCl, 6 M HNO3, 6 M NH4OH, and 6 M H2SO4. To make 30 mL of 6 M HCL, 14.8 mL of the acid was added to 15.2 mL of deionized body of water. To make 30 mL of 6 M HNO3, 11.4 mL of the acid was added to 18.6 mL of deionized water. To make 30 mL of 6 M NH4OH, 12.0 mL of the acid was added to 18.0 mL of deionized water. Finally, to make 30 mL of 6 M H2SO4, 9.93 mL of the acid was added to 20.07 mL of deionized water.

The remainders of these acidic solutions from the previous weeks experiments were stored in the laboratory cabinets and used in this weeks experimentations. Refer to puzzle out 9.1 on Page 94 of the lab manual for the observational office (DePaul University, 94). This flowchart was followed for the known sample. The flowchart was then repeat for the u nknown sample. Instead of using NH3, NH4OH ! was used. Precisely fifteen drops of deionized water were... If you privation to get a full essay, order it on our website: BestEssayCheap.com

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