Post-lab Exercises
: Say, for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate, NaC2H302, with 100.0 mL of 1.0 Macetic acid. 1. What would be the initial pH of Buffer C? (5 pts) 2. You add 5.0 mL of 0.5 M NaOH solution to 20.0 mL each of Buffer B (from your experiment) and Buffer C. Which buffer's pH would change less? Explain. (5 pts) 3. What would be the final pH of Buffer from question 2, above? Show your work (5 pts) 4. What would be the final pH of Buffer Cfrom question 2, above? Show your work. (5 pts)
Buffer A: .149
Buffer B:1.49

Please note composition of buffer B is not given. kindly use the same way as done in buffer C.
Post-lab Exercises : Say, for example, that you had prepared a Buffer C, in which you...
Say for example, that you had prepared a Buffer C, in which you mixed 8.203 g of sodium acetate,NaC2H3O2, with 100.0 mL of 1.0 M acetic acid. 1A. What would be the initial pH of Buffer C 1B. If you add 5.0 mL of 0.5 M NaOH solution to 20.0 mL each of Buffer B( initial pH of Buffer B is 3.83), and Buffer C, Which buffer's pH would change less? Explain
5. Say, for example, that you had prepared a Buffer X, in which you mixed 8.203 g of sodium acetate, NAC2H302, with 100.0 mL of 1.0 M acetic acid. What would be the initial pH of Buffer X? I
Say, for example, that you had prepared a Buffer C, in which you
mixed 8.203 g of sodium acetate, NaC2H3O2, with 100.0 mL of 1.0 M
acetic acid.
a. What would be the initial pH of Buffer C?
pH of Buffer C = 4.74, pH of Buffer B = 4.74
b. If you add 5.0 mL of 0.5 M NaOH solution to 20.0 mL
each of Buffer B and Buffer C, which buffer’s pH would change less?
Explain.
Buffer ABufferB...
Lab 5: Buffers Data analysis 1. Write reaction equations to explain how your acetic acid- acetate buffer reacts with an acid and with a base, respectively. 2. Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is: "The amount of Hor OH that can be neutralized before the pH changes by one unit." Use your data to determine the buffer capacity of Buffer A and Buffer B....
DATA TABLE Buffer A Buffer B Mass of NaC2H3O2 used to prepare buffer (g) 0.149 g 1.49 g Volume of buffer prepared (mL) 100.0 100.0 Molar concentration of HC2H3O2 in buffer (M) 0.1 1.0 Initial pH of buffer 4.24 4.33 Volume of 0.5 M NaOH to raise pH by 2 units (mL) 1.5 19.0 Volume of 0.5 M HCl to lower pH by 2 units (mL) 1.0 5.0 Volume of 0.5 M NaOH at equivalence point (mL) 1.75 19.75 3. ...
help with 2 buffer questions please.
data table and questions in pics thank you
Buffer B Buffer A .0 39 3 Mass of NaC2H3O2 used to prepare buffer (g) NO0-0 20 Volume of buffer prepared (mL) 1.0 0.1 Molar concentration of HC2H3O2 in buffer (M) 4.13 4.23 3.7 Initial pH of buffer Volume of 0.5 M NAOH to raise pH by 2 units (mL) 37.5 4.2mL Volume of 0.5 M HCI to lower pH by 2 units (mL) 3,1 m35...
Buffer A Buffer B Mass of NaC2H3O2 used to prepare buffer (g) .149 1.49 Volume of buffer prepared (mL) 100.0 100.0 Molar concentration of HC2H3O2 in buffer (M) 0.1 1.0 Initial pH of buffer 4.0 4.0 Volume of 0.5 M NaOH to raise pH by 2 units (mL) 2 5 Volume of 0.5 M HCl to lower pH by 2 units (mL) 3 7 Volume of 0.5 M NaOH at equivalence point (mL) 4.5 10 Buffer capacity has a rather...
Post-Lab Assignment: pH and Buffers 1. A buffer is prepared from a weak acid with a Ka - 7.1 x 104 and its conjugate base. a. What pH would provide maximum buffer capacity? b. What would be the buffer range for this acid? (Your answer should show the lowest and the highest pH that would provide a reasonably effective buffer.) 2. If you were provided with a 0.1 M solution of an unknown weak acid and a 0.1 M solution...
=Assume you have prepared 100.0 mL of a buffer solution using 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate. The pH of this buffer solution is initially 4.74. After preparing this buffer solution, you added 55.0 mL of a 1.10 M NaOH solution to your buffer to see what would happen. What will the pH of this new solution be?
Pre-Lab Calculating pH and Buffer Capacity (You must show work for credit) Name: 1. Calculate the volume of glacial acetic acid (17.6 M) and mass of sodium acetate (mm 82.03) required to make 102 ml of 0.20 M buffer at pH 4.85. The Ka of acetic acid is 1.4 x10. (this question is challenging, use the background section and your book for help). 2. Consult the table of Ka values in the back of your textbook and suggest acid/conjugate base...