CHEM 2 lab 5

CHEM 2 lab 5 - Bobby Bardin II 10/17/07 Experiment #5...

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Bobby Bardin II 10/17/07 Experiment #5 Applying Le Chatelier’s Principle Data: Step 1: stress applied to system 2: disturbanc e to system 3: Predict observations: A: color change from X to Y B: color change from Y to X C: solid precipitates from solution D: solid dissolves in solution E: no change in equilibrium 4: Predict what the disturbance might cause A: equilibrium shifts right B: equilibrium shifts left C: no change in equilibrium 5: Data and observation s obtained in the lab 6: How was the equilibrium disturbed A: equilibrium shifts right B: equilibrium shifts left C: no change in equilibrium 7: see di sc us si on K vs Q A2 H 2 O added Excess H 2 O A A Turns pink A K>Q A3 HCl added Cl - increased B B Turns blue again B K<Q A4 AgNO 3 added Cl - decreased A A Precipitated pink A K>Q A5 Ethanol added H 2 O decreased B B Turned purple B K<Q A6 Increase temperatur e Heat added If endo / exo a/b a/b Turned blue B K<Q A7 Decrease temperatur e Heat removed If endo / exo b/a b/a Turned pink A K>Q B2 NaOH added -OH increased C B White precipitate B K<Q B3 HCl added -OH decreased D A Solution goes clear A K>Q B4 EDTA added Mg 2+
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CHEM 2 lab 5 - Bobby Bardin II 10/17/07 Experiment #5...

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