Qualitative Analysis Of Cations Lab Report

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Dillion Dutton September 24, 2014 Experiment #5 Separation and Qualitative Analysis of Cations Chem 1315- 012 Purpose of this experiment and techniques: The purpose of this experiment is to observe and analyze the chemical behavior through conducting a qual scheme. In this experiment you will interact with a centrifuge which is a device that rotates rapidly to separate fluids of different densities. A precipitate is a solid that is created from a solution. A supernatant is a substance that is above a sediment or precipitate. Chemicals and Materials Required: The chemicals required in this experiment: 6M hydrochloric acid, potassium nitrate, 6M nitric acid, 0.1M potassium thiocyanate, 6M ammonium hydroxide, 3% hydrogen peroxide6M sulfuric…show more content…
Record your observations. To test for Cu2+, we will add 6M NH3 dropwise to Test Tube five until the solution is basic. We will test the solution with a red litmus paper strip, using a new litmus paper strip for each test. Once basic, we will add 1 mL more of the 6M NH3 and stir the mixture. We will centrifuge the test tube and transfer the supernatant to Test Tube seven. If the liquid in Test Tube seven is a blue color, then there are Cu2+ ions present. Record your observations. We will add ten drops of distilled water to the precipitate in Test Tube five and stir the mixture. Next we will add 6M sulfuric acid dropwise while stirring until the precipitate dissolves. We will transfer half of the solution to Test Tube eight. To test for Fe3+ we will add five drops of 0.1M KSCN solution to Test Tube five. If the liquid in the test tube turns a deep red color, then Fe3+ ions are present. Record your observations. To test for Bi3+ we will add two drops of 6M hydrochloric acid solution to Test Tube eight and stir the mixture. We will obtain a one-hundred mL beaker and fill it with about seventy five mL of tap water. We will add a few drops of the solution in Test Tube eight to the beaker of tap water. If

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