exp+1 - Experiment 3 Title Chemical Equilibrium and Le...

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Title Chemical Equilibrium and Le Chatelier Principle Aims To study the application of Le Chatelier’s principle to know: The effect of the addition of + 3 Fe and - SCN to an equilibrium mixture of + 3 Fe , - SCN , and + 2 ) ( SCN Fe . The effect of the addition of an acid to an equilibrium mixture of + 2 Ni , 3 NH and + 2 6 3 ) ( NH Ni . The effect of the addition of acids and bases on the solubility of 4 2 O BaC and 2 ) ( OH Cu in water. 0.1 M Fe(NO 3 ) 3 , 0.1 M KSCN, 0.1 M Ni(NO 3 ) 2 , 6.0 M NH 3 , 6.0 M HCl, 0.1 M (NH 4 ) 2 C 2 O 4 , 0.1 M BaCl2, 1.0 M HCl, 0.1 M CuCl2, 0.1 M NaOH, 1.0 M NaOH, deionized water, 50ml measuring cylinder, 100ml beaker, glass rod Experimental procedure A. Equilibrium of + 3 Fe and - SCN with + 2 ) ( SCN Fe 1. Each of three tubes were marked with an identification number (1,2 and 3 ) 2. 20 ml of deionized water from a 50 ml measuring cylinder was added to a 100ml beaker. Next, 20 drops of 0.1 M Fe(NO 3 ) 3 and 20 drops of 0.1 M KSCN were added to the beaker. 3. 3ml of this solution was added to each of the three test tubes by using a 5 ml Mohr pipet (graduated pipet). 4. 20 drops of 0.1 Fe(NO 3 ) 3 was added to test tubes 1 and mixed by gentle shaking. 5. 20 drops of 0.1 KSCN was added to test tube 2 and mixed by gentle shaking. 6. 20 drops of deionized water was added to test tube 3 and mixed. The color of contents of this tube was served as reference. 7. The colors in test tubes 1 and 2 were compared with the color in the reference test tube. The intensity of the colors in each tube will indicate the relative concentration of Fe(SCN) + 2 in that test tube. For the best results, the tubes were viewed down their lengths against a white paper. Observations were recorded.
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This note was uploaded on 08/19/2010 for the course CHEMISTRY 123910 taught by Professor John during the Spring '10 term at Columbia College.

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exp+1 - Experiment 3 Title Chemical Equilibrium and Le...

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