(6 points) 95. A student is given three different acetic acid/acetate (HC2H302/C2H302) buffers: Buffer 1: HC2H302/C2H302* has a ratio of (1:1) Buffer 2: HC2H202/C2H302″ has a ratio of ( 1:10) Buffer 3: HC2H302/C2H302 has a ratio of 1:100) Buffer 4: HC2H302/C2H302has a ratio of ( 1:1000) In two experiments, a student is asked to measure the pH of these Buffers (1 through 4) (20.0 mL each) followed by these experiments. Experiment I: The student adds 2 drops of 1M HCl to each of the 20.0 mL buffer solution (Buffers 1 through 4) and then measures the pH of these solutions after the addition of the HCI. Experiment II: The student adds 2 drops of 1M NaOH to each of the 20.0 mL buffer solution (Buffers 1 through 4) and then measures the pH of these solutions after the addition of the NaOH. The results from these experiments are shown below. Buffer 1 (1:1) pH Buffer 2 Buffer 3 (1:10) (1:100) pH Грн 5.977.00 Buffer 4 (1:1000) pH, 7.82 pH Before the addition of HCI pH After the addition of HCI 4.84. 5.87 6.60 6.82 PH Before the addition of NaOH 4.84 7.00 7.82 pH After the addition of NaOH 4.84 7.50 10.82

Q5. Explain the results of these two experiments (I and II) shown above. In other words describe how addition of HCl and addition of NaOH, respectively effects the pH for each of the buffer solutions (Buffer 1, 2,3 and 4) and why? TIP Add Ruffer solution (1:1) the pH=pla maling it at equilibrium and a Nective buffer. When the addition of Hel and Nalth came the pH of the buffer solution would increase however be alittle han c on