Lab 19a Investigating Chemical Equilibrium – Lab Report – Sabrina Tong
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Lab 19a Investigating Chemical Equilibrium
Lab 19A: Investigating Chemical EquilibriumPurpose: To observe shifts in equilibrium concentrations when stresses such as temperature changes are applied through recognizing macroscopic properties of chemical systems and being able to explain the results using Le Chateliers principle.Materials: Please see page 209 of the “Heath Lab Manual.” Note: Changes made to the materials/procedure include the optional use of microplates for parts 4 and 5, 250mL Erlenmeyer flasks for parts 1 and 2, 100mL graduated cylindres for part 3, and 10mL graduated cylindres for measuring.Procedure: Please see pages 209-212 of the “Heath Lab Manual.”Note: Changes made to the materials/procedure include the optional use of microplates for parts 4 and 5, 250mL Erlenmeyer flasks for parts 1 and 2, 100mL graduated cylindres for part 3, and 10mL graduated cylindres for measuring.Data and Observations:Table #1: Equilibrium Involving Thymol BlueReagent addedStress (ion added)Colour observationDirecton of equilibrium shiftHCl (step 3)HCl (step 4)NaOH (step 5)NaOH (step 6)Table #2: Equilibrium Involving Thiocyanatoiron (III) Ion Reagent addedStress (ion added)ObservationDirection of equilibrium shiftKCl (test tube B)Fe(No3)3 (test tube C)KSCN (test tube D)NaOH (test tube E)Table #3: Equilibrium Involving Cobalt (II) ComplexesStress Observation Direction of equilibrium shiftStep 4Step 5Step 6Table #4: Equilibrium Involving Chromate and Dichromate Ions Steps 2 and 30.1M K2CrO40.1M K2Cr2O7Initial Colour1M NaOH added1M HCl addedStep 40.1M K2CrO40.1M K2Cr2O7Initial Colour1M HCl added1M NaOH addedSteps 5 and 6Initial Colour+1M NaOH+0.1M Ba(NO3)2+1M HCl0.1M K2CrO4Steps 7 and 8Initial Colour+1M HCl+0.1M Ba(NO3)2+1M NaOH0.1M K2CrO4Step 90.1M K2CrO40.1M K2Cr2O7Add 1.0M Ba(NO3)2Table #5: Equilibrium Involving Copper (II) Complexes
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By: Sabrina Tong
Submitted: December 17, 2017
Essay Length: 1,279 Words / 6 Pages
Paper type: Lab Report Views: 517
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