header jpg Bu ers Worksheet As you work through the steps in the lab procedures record your experimental values and the results on this worksheet 1 Show your calculation for preparing the 0 60 M HC2H3O2 solution from your prelab assign ment 2 Show the calculation of how many grams of NaC2H3O2 3 H2O are needed from your prelab assignment Table A pH Data for Acetate Bu ers Direct Method 3 Explain the order of pH for the ve solutions Consider the relative amounts of acid and base in each c cid 13 2010 Advanced Instructional Systems Inc and North Carolina State University 1 Table B pH Data for Acetate Bu ers Indirect Method 4 How many mmol of acetic acid are present in your sample 1B Show your work 5 How many total mmol of NaOH have you added at this point Show your setup Enter this amount in Data Table B 6 Is this solution a bu er solution Explain your reasoning Fill in Data Table B with your choice 7 Will you need to use Na3PO4 12 H2O or NaH2PO4 H2O in order to generate the desired pH Explain your answer Enter your choice in Data Table C c cid 13 2010 Advanced Instructional Systems Inc and North Carolina State University 2 8 What mass of the other phosphate compound will you need to add in order to generate the desired pH Show your work Enter this amount in Data Table C Table C Data for Phosphate Bu er c cid 13 2010 Advanced Instructional Systems Inc and North Carolina State University 3