Experiment 6 Ka of a weak acid (Spring 2017)
* Required
Enter your names
*
Your answer
Your section
*
Section CC (8 AM)
Section EE (11 AM)
Your station (Enter Number and A or B, leaving no space. For example 1A, 4B, 7A, etc.)
*
Your answer
1. (1 pt) We determined the equivalence point by interpolation of the 2nd derivative. In this and the next question you will enter the data pairs you used in the interpolation so I can check your math. Enter the Volume and 2nd derivative value, separated by a comma and without any units, for the last point prior to the equivalence point. For example, 20.42, 4.323. Do not use units or ()  just the pair of data.
Your answer
2. (1 pt) Enter the Volume and 2nd derivative value, separated by a comma and without any units, for the first point after the equivalence point. For example, 21.84, 3.338. Do not use units or ()  just the pair of data.
Your answer
3. (3 pts) What value for volume did you calculate by interpolation using the data pairs listed above? Express your answer to THREE places past the decimal, even though significant figures do not support such precision  it is so I can compare my answer with yours. Include units this time.
Your answer
4. (1 pt) The next four questions refer to the point halfway to the equivalence point, where we determined pKa. Enter the Volume and pH value, separated by a comma and without any units, for the last point prior to the halfequivalence point. For example, 10.42, 4.03. Do not use units or ()  just the pair of data.
Your answer
5. (1 pt) Enter the Volume and pH value, separated by a comma and without any units, for the first point after the halfequivalence point. For example, 10.53, 4.17. Do not use units or ()  just the pair of data.
Your answer
6. (3 pts) What value for pH (pKa) did you calculate by interpolation using the data pairs listed in Questions 4 and 5, above? Express your answer to THREE places past the decimal, even though significant figures do not support such precision  it is so I can compare my answer with yours. Values for pH or pKa do not have units.
Your answer
7. (2 pts) Rewrite your pH (pKa) answer from Question 6 to the correct number of significant figures.
Your answer
8. (2 pts) What is Ka to two significant figures? Use Excel format (example: 5.5E05), leaving no spaces.
Your answer
Your full Creighton email address is...
Your answer
Your partner's full Creighton email address...
Your answer
Submit
Never submit passwords through Google Forms.
This content is neither created nor endorsed by Google.
Report Abuse

Terms of Service

Additional Terms
Forms