Innovative and self-directed, EXPERIMENTS IN GENERAL CHEMISTRYFEATURING MEASURENET, 2nd Edition prepares students for the laboratory setting by. Experiments in General Chemistry Featuring MeasureNet Guided Inquiry, Self- Directed, and Capstone Second Edition Bobby Stanton University of Georgia Lin . Innovative and self-directed, EXPERIMENTS IN GENERAL CHEMISTRY: FEATURING MEASURENET, 2nd Edition prepares students for the.

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Add 10 mL of 0. Part B of this experiment is a collaborative project. For example, the reaction of aqueous solutions of calcium chloride and silver nitrate produces silver chloride a white precipitate and aqueous calcium nitrate as shown in the equation below.

Why was this instruction given? Should the colors of the metal ion solutions be recorded in the Lab Report?

Experiments in General Chemistry: Featuring MeasureNet

Because most Group IA and IIA metals are present in living organisms, these metals generally are not toxic when present in water supplies, but in elevated concentrations, they can cause salinity experients. The First Law msasurenet Thermodynamics, or Law of Conservation of Energy, states that energy can neither be created nor destroyed during ordinary physical or chemical changes, but it can be transferred from one system to another.

The aforementioned laws of thermodynamics indicate what will happen as the water and substance contact each other. Wash the graduated cylinder with soap and water before proceeding to the next step. The General rules for the solubilities of ionic compounds in water are provided in Table 3 of Experiment 7.


Exoeriments the 3s valence electron of Na to be promoted to a 3p, 4p or 5p excited state, the electron must absorb the correct amount quantum of energy Figure 2. A Figure 2 A sample chromatogram 7. Lisa Lockwood Development Editor: If a precipitate forms, write complete and balanced formula unit and net ionic equations for the reaction. If these chemicals contact your skin, wash the affected area with copious quantities of water and inform your lab instructor.

Repeat steps 22—24 several times in succession to produce a spot size of 3—4 mm for each metal ion on the rxperiments. Immediately replace the lid on the calorimeter.

Use the information provided in Table 2 to identify your unknown metal. What is in feturing Container A Capstone Experiment. A list of insoluble metal hydroxides that form soluble complexes in excess OH ions is provided in Table 4. It is a violation of Federal Law to leave a Waste Container uncapped.

Experiments in General Chemistry: Featuring MeasureNet

At the end of the experiment, return the Dixie cup, insulating materials cloth, paper, aluminum foil, styrofoam peanuts, sea sand, if drycardboard lid, and the cups generao the laboratory instructor. Add 2—3 drops of phenolphthalein indicator to the HCl solution. Complete all steps in Appendix F before proceeding to Step 34 below. Figure 3 depicts an emission spectrum for sodium atoms in aqueous solution.

Obtain a crucible and lid. Temperature changes will be monitored by recording temperature versus time scans thermograms using the MeasureNet temperature probe. By Experiment 10 n Emission Analysis of Aqueous Solutions of Groups IA and IIA Metal Salts 5p nm 3 30 nm 3p n m Potential energy 4p 3s Figure 2 Excited state transitions for a Na atom comparing the spectrum of an unknown water sample to the spectra of water samples containing known metal ions, it is possible to identify the metal ions present in the unknown water sample.


Let the residue cool to room temperature and discard it into the trash can. Carefully roll the chromatography paper into a cylinder, with the metal spots facing out visible to you and the origin line at the bottom of the cylinder see Figure 4.

There are no absorbance bands where only Cr VI absorbs. Never pipet by mouth.

Acid-Base Reactions Nonredox Add similar amounts 3 mL of both water and mineral oil to a mL graduated cylinder. Does a wxperiments reaction occur? What unit should be used to when recording the wavelength of each emission line?

Heat the crucible with a Bunsen burner until the bottom of the crucible experments cherry red for 5 minutes. To determine the amount of energy emitted by an electronic transition in an atom, we must know either the wavelength or frequency of the emitted light.

Clean the crucible by adding 2—3 milliliters of 6 M hydrochloric acid HCl. Using the plastic scoopula prepared in Step 9, withdraw approximately 0.

Should the color of the solution be noted in the Lab Report? Identify the metal ions present in the unknown solution.