Pre-Lab Quiz 5

Pre-Lab Quiz 5 -...

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http://chemmac1.usc.edu/cttccgi/randquiz.cgi 1 of 2 Web Quiz You can login to this page multiple times but you cannot take the quiz more than once. . Submit your answer for grading by Clicking on the "Grade Answers" button at the bottom of the page only when you are sure of your answers. Question # 1 If 0.1 M aqueous solutions of the following pairs of substances are mixed together, which pair could result in the formation of a precipitate? A. Na 2 S, FeCl 3 B. NaOH, KNO 3 C. KCl, Al(NO 3 ) 3 D. Ni(NO 3 ) 2 , Mg(NO 3 ) 2 E. NaOH, HCl Question # 2 In the course of various qualitative analysis procedures, the following mixture is encountered: Na + and K + . Suggest how this mixture might be separated. You may need to refer to Table 4.1 from Zumdahl. A. add dilute HCl B. add 0.2 M HCl and H 2 S C. add (NH 4 ) 2 S at pH 8 D. add (NH 4 ) 2 HPO 4 to a basic solution E. It is not possible to separate the ions using any reaction scheme found in either Zumdahl or your lab manual. Question # 3
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This note was uploaded on 08/21/2008 for the course CHEM 105BL taught by Professor Warshel during the Spring '07 term at USC.

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Pre-Lab Quiz 5 -...

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