Unknown Scheme - Lauren Spang 9103-7679 Unknown Scheme 2A/2B I Step 1 should be a description of the sample taking note of color phase odor crystal

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Lauren Spang 9103-7679 Unknown Scheme 2A/2B I. Step 1 should be a description of the sample, taking note of color, phase, odor, crystal shape (if crystalline), and solubility. II. Step 2 should be a flame test of the sample. A red flame indicates that the Ca2+ cation is present and that Na+ is absent, an orange flame indicates that Na+ is present and possibly K+ and NH4+, a purple flame indicates that K+ is present and possibly NH4+, and no flame color indicates that Na+, K+, and Ca2+ are absent while NH4+ may be present. III. Step 3 should be a pH test after about ½ to 2/3 of the sample is dissolved (if it is soluble in water). After filling several test tubes or vials with the solution, pH will be estimated by using color indicators and the pH table located in Assignment 1. As learned in Assignment 2, a pH of 1.5-2 indicates that HSO4- is present and that OH- is not present. At a pH of 2.5 SO4 2- is present. pH 5-6 indicates that NH4+ is present, and pH 7 indicates that OH- is not present but
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This note was uploaded on 02/08/2012 for the course CHM 2046L taught by Professor Horvath during the Spring '08 term at University of Florida.

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