Buffers Lab (I ONLY NEED HELP WITH #5)
The 2 buffers are (acetic acid + sodium acetate) and (acetic acid + sodium hydroxide)
3:The two buffers that you will make in class are identical. If 5.00mL of a 1.0 M NaOH solution is added to one of these buffers, what would be the resulting pH after addition?
---Had to make a IACE table and what I got was pH=5.20
4: What is the total volume of NaOH (1.0 M) you should add to the other buffer solution (not the same one as in problem #3) so that it is no longer a buffer?
18.0 mL
5: The procedures for the lab instruct you to take the volume calculated in problem #4 and added it in 4 aliquots (divide the total volume by 4 to get the volume added per each addition). What will the pH be after each addition?
Please answer this question and explain steps if possible.
Buffers Lab (I ONLY NEED HELP WITH #5) The 2 buffers are (acetic acid + sodium...
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....
D. Buffers 1. A buffer solution was made by dissolving 10.0 grams of sodium acetate in 200.0 mL of 1.50 M acetic acid. Assuming the change in volume when the sodium acetate is added is not significant, estimate the pH of the acetic acid/sodium acetate buffer solution. The K, for acetic acid is 1.8 x 105. 2. Calculate the pH of a buffer solution that initially consists of 0.0400 moles of ammonia and 0.0250 moles of ammonium ion, after 20.0...
7. Acetate buffers are used in biochemical studies of enzymes and other chemical components of cells to prevent pH changes that might change the biochemical activity of these compounds. a) Calculate the pH of an acetate buffer that is a mixture with 0.10M acetic acid and 0.10M sodium acetate. b) Calculate the pH after 1.0 mL of 0.10M NaOH is added to 100.0mL of this buffer, giving a solution with a volume 101.0mL.
A buffers solution is prepared from equal volumes .200M acetic acid and .600M sodium acetate. Use 1.8x10^-5 as Ka for acetic acid. What is the pH of the solution that results when 3.00 mL of .034 M HCl is added to .200L of original buffer?
Properties of Buffers Lab.
I need help with problems 7 & 8. They’re pretty similar,
but I’m confused on whether I’m doing them right.
I need to calculate the moles of HCl and NaOH and then somehow
insert them into the log fraction in the Henderson Hasselbach
formula, is that right?
Procedure (values are needed in procedure):
Measured values during lab that I’ll be comparing #6/7/8
to:
Questions I need help with:
Part B Procedures: 1. Weigh about 3.5g of...
Part 1: Buffers Considering the acetic acid sodium acetate buffer, complete the table below NaOH added/mL. measured pH 0.0 20 Did the pH change a little or a lot when NaOH was added to the butter? Was the change you observed consistent with the action of a butter? For the ammonium chloride-ammonia buffer give the measured pH for the 50.0 mL of 0.10 Mammonia. Is this solution acidic, neutral, or basic? Did the pH of the ammonia increase or decrease...
With this information what is the PH of the .1 M
acetic acid sol and .1 M acetic acid buffer sol? Please help
solutions to observe that buffers resist pH changes. Burette readings should be made to the nearest 0.1 mL (or 0.05 mL if possible), A. Preparation of Acetic Acid-Acetate Buffer Solution An acetate buffer contains the acid-base pair, acetic acid and the acetate ion (typically added as sodium acetate). For acetic acid, pK, = -log (1.8 x 10-)...
For a buffer made from sodium acetate and acetic acid, the Ka of acetic acid is 1.8E-5. What mass of sodium acetate (NaCH3CO2) must be added to 2.50 L of 0.68 M acetic acid to make a buffer solution with pH = 5.75? The answer should be in two significant figures.
A buffer solution is made by combining 1.00L of 0.350M Acetic Acid (Ka = 1.8x10-5) and 1.00L of 0.380M sodium acetate.What is the pH of the buffer after 5.00mL of 2.00M NaOH is added?
A 300.0 mL buffer solution is 0.220 M in acetic acid and 0.220 M in sodium acetate. What is the pH after addition of 0.0150 mol of HCl? What is the pH after addition of 0.0150 mol of NaOH?