Answer Happy

Report Table BU.1: pH after addition of HCI pH after additions of 10 drops of 6 OM HCI Initial pH pH after 10 drops HCI pH after 20 drops HCI pH after 30 drops HCI 1.47 1.22 Beaker #1 263 1.65 4.18 321 175 Beaker #2 1.43 454 4 15 208 Beaker #3 3.39 4.55 3.79 252 4.93 Beaker 14 Beakers 5.28 480 3.91 465 769 481 Beaker #6 5.30 4.38 From the procedure 11. Rinse out all of the small beakers and mix up the buffer solutions as described in Table BU 1 again Measure each solution's pH with the pH meter and record 12 Obtain a dropper bottle of 6 OMNOH. Add 10 drops of 60 M NaOH to each beaker and stir 13. Rinse the pH electrode with Diwater Measure and record the pH of each solution Discard any solutions with a pH change of more than 10 pH units
2. Calculate the theoretical pH of each solution as follows a For the undiluted acid solution in beaker perform a weak acid problem to calculate the pH of O 50 MHC,H,O, b. Use the Henderson Hasselbalch equation from Equation BU 2 to calculate the ph of the buffer solutions in beakers 2-5 c. For the undiluted base solution in beaker 6, perform a weak base problem to calculate the pH of 0 50 M NAC,H,O, 3 Compare the measured pH of each buffer solution to its calculated pH in Report Table BU.4 Note: Report the absolute value of the difference in pH. Report Table BU. 4: Comparison of measured and calculated initial pH Difference between measured pH and calculated theoretical pH of solution Table view Ustview Measured pH Calculated pH ApH Beaker 81 263 Beaker 2 418 Beaker #3 454 Beaker #4 493 Beakers 528 Beaker #6 7.69