Le Châtelier’s Principle is described in terms of adding/removing reactants or products. While it is easy to add reactants/products, describe how you were able to remove reactants/products from the equilibria by using the procedures in this experiment. What are the net ionic equations as appropriate for:   The following reaction is examined: HSO4¯ (aq) + H2O (l) ⇌ SO42¯ (aq) + H3O+ (aq)  Obtain about 5 mL (one small test tube) of “NaHSO4 solution” and “Na2SO4 solution” in two  appropriately labeled test tubes.  In a well plate, take 10 drops of NaHSO4 into wells  A1, A2 and A3, and 20 drops to wells A4 and A5 using a pipet.  Add 1 drop of Thymol Blue indicator solution to wells A1 to A5. Thymol Blue is red in very acidic solution, and changes from red to yellow between pH 1.2-2.8.  Add one drop of Na2SO4 to well A1. Continue to add drops of Na2SO4 to well A1 until you see a color change, making sure to mix the solution after the addition of each drop (do not use the pipet tip to mix the solutions).  Add a crystal of NaHSO4 to well A3. Keep adding crystals until a color change.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Le Châtelier’s Principle is described in terms of adding/removing reactants or products. While it is easy to add reactants/products, describe how you were able to remove reactants/products from the equilibria by using the procedures in this experiment. What are the net ionic equations as appropriate for:  

The following reaction is examined:
HSO4¯ (aq) + H2O (l) ⇌ SO42¯ (aq) + H3O+ (aq) 
Obtain about 5 mL (one small test tube) of “NaHSO4 solution” and “Na2SO4 solution” in two 
appropriately labeled test tubes. 
In a well plate, take 10 drops of NaHSO4 into wells  A1, A2 and A3, and 20 drops to wells A4 and A5 using a pipet. 
Add 1 drop of Thymol Blue indicator solution to wells A1 to A5. Thymol Blue is red in very acidic solution, and changes from red to yellow between pH 1.2-2.8. 
Add one drop of Na2SO4 to well A1. Continue to add drops of Na2SO4 to well A1 until you see a color change, making sure to mix the solution after the addition of each drop (do not use the pipet tip to mix the solutions). 
Add a crystal of NaHSO4 to well A3. Keep adding crystals until a color change. 
Effect of Temperature:
Place the contents of well A4 into a hot water bath. 
Place the contents of well A5 into a cold water bath. 
A comparison of the color of A4 with A5 will help you in your analysis.

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