Lab Report for Group I Cations

EXPERIMENT 9: GROUP II CATIONS PURPOSE Numeric values are not the end all and be all of chemistry experiments. soft observations are equally cardinal as indicators of chemical perplex for 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 function of rapidly spinning the solutions in a centrifuge, adding different acerbs to the solutions, and analyzing the reactions of the rest liquids and precipitates, the qualitative data in this experiment determined the comportment of copper, bismuth, lead, and tin in a know and unknown touchstone solution. PROCEDURE In the former weeks experiment, the proper molarities of the prerequisite acids were prepared. The molarities of these acids implicate: 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 blistering solutions from the previous weeks experiments were stored in the research laboratory cabinets and used in this weeks experimentations. Refer to kind 9.1 on Page 94 of the lab manual for the experimental office (DePaul University, 94). This flowchart was followed for the known sample. The flowchart was then repeat for the unknown sample. Instead of utilize NH3, NH4OH was used. Precisely fifteen drops of deionized water were... If you privation to get a full essay, order it on our website: Orderessay

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