Attendance at Pre-lab Meeting
Copies of lab pages attached; labeled with name and date, complete information, readable, data recorded matches results given in report| /5| Waste was properly disposed of and lab area was cleaned
Evaluation of student performance overall (student was on time, followed safety rules, performed the lab correctly and within the time allowed, etc) Total for General Grading Items Data Analysis and Interpretation
Total for Data Analysis and Interpretation
Data Table Buffer A| Buffer B| Mass of NaC2H3O2 used to prepare buffer (grams)
Volume of buffer prepared (mL) 100. 0| 100. 0
Molar concentration of HC2H3O2 in buffer (M) Initial pH of buffer
Volume of 0. 5 M NaOH to raise pH by 2 units (mL)
Volume of 0. 5 M HCl to lower pH by 2 units (mL)
Volume of 0. 5 M NaOH at equivalence point (mL)
Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base.
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 H+ or OH– that can be neutralized before the pH changes to a significant degree. ” Use your data to determine the buffer capacity of Buffer A and Buffer B. (Graphically, we can identify buffer capacity by the sudden change to a very steep slope. )
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? 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.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more