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Exploring Buffers and Buffer CapacityREBECCA FORLOINELAB PARTNER: TERRENCE CONNORSFEBRUARY 17, 2015Having read the Georgia Institute of Technology Academic Honor code, I understand and accept my responsibility as a member of the Georgia Tech Community to uphold the Academic Honor Code at all times. In addition, I understand my options for reporting honor violations as detailed in the code.
Data and ResultsA.Data Tables and Plotsa.Sodium Acetate/Acetic Acid Bufferi.Table 1. Data for Acidic BufferAssigned pH5.2Mass Sodium Acetate Trihydrate(g)3.97Measured pH5.22ii.Procedure and Results 1. Base Capacity of Acidic Buffer1.In 4 separate test tubes combine (1) 1mL of 0.5M HCl and 10mL of buffer, (2) 1mL of 0.5M NaOH to 10mL of buffer, (3) 1mL of 0.5M HCl to 20mL of buffer, and (4) 1mL of 0.5M NaOH to 20mL of buffer. Calculate the pH of the solutions. 2.Use the balanced equations for the reaction of the buffer with the strong acid and the strong base, along with the Henderson-Hasselbalch equation to calculate the new pH of the solution. Compare predictions with actual results. The measured pH values are listed below:SolutionpH1mL HCl and 10mL of buffer5.101mL NaOH and 10mL buffer5.881mL HCl and 20mL of buffer5.251mL NaOH and 20mL buffer5.64iii.Procedure and Results 2. Base Capacity of Water a Control1.In 4 separate test tubes combine (1) 1mL of 0.5M HCl and 10mL of deionized water, (2) 1mL of 0.5M NaOH and 10mL ofdeionized water, (3) 1mL of 0.5M HCl and 20mL of deionized water, and (4) 1mL of 0.5M NaOH and 20mL of deionized water. The resulting pH is recorded below:SolutionpH1mL HCl and 10mL of water2.931mL NaOH and 10mL water13.751mL HCl and 20mL of water3.161mL of HCl and 20mL water13.27b.Sodium Bicarbonate, Sodium Carbonate bufferi.Table2. Data for Basic Buffer