Determining Ka of Weak Acid

Watch:

Read: Your lab guide (VERY important) and lab manual

Complete: Lab Report below (attach your graphs)

At one-half the equivalence point of an acid base titration, the pH is equal to the ______.

What indicator is being used in this titration? ___________________

What pH do we expect at the equivalence point of this titration of a weak acid and strong base?

Acidic

Basic

Neutral

The shape of a titration curve ,since based on the logarithmic scale, best resembles which letter?

S

L

U

I

Data:

TRIAL 1

TRIAL 2

mL NaOH

pH

mL NaOH

pH

0

3.08

0

3.10

0.50

3.35

0.6

3.37

2.4

3.80

2.8

3.82

3.7

4.00

3.6

4.05

4.4

4.05

4.3

4.10

5.8

4.20

5.4

4.25

7.3

4.28

7.1

4.32

8.9

4.39

8.6

4.44

10.7

4.49

10.2

4.52

12.8

4.62

12.6

4.66

14.6

4.72

15.0

4.75

15.8

4.78

16.0

4.85

17.4

4.88

17.7

4.91

19.9

5.05

20.1

5.08

20.9

5.15

21.4

5.20

22.4

5.31

22.0

5.33

23.7

5.50

23.8

5.52

24.4

5.65

24.5

5.68

24.7

5.75

24.9

5.80

25.1

6.00

25.5

6.12

25.8

6.30

26.0

6.35

26.0

6.75

26.3

7.80

26.2

7.45

26.3

7.49

26.3

8.85

26.5

8.90

27.0

10.40

27.0

10.44

27.3

10.55

27.3

10.61

28.2

10.85

28.5

10.88

29.9

10.95

30.0

11.00

30.1

11.05

30.2

11.10

31.5

11.15

32.6

11.20

32.7

11.24

32.9

11.35

Graph each set of data!

Indicate how you arrived at the volumes you entered below by indicating the volume Volume @ Equivalence Point and Volume @ ½ Equivalence Point on our graphs (draw dotted lines, use color, etc).

Complete the table (show calculations below it):

Determined from Graphs

Trial 1

Trial 2

Volume @ Equivalence Point

Volume @ ½ Equivalence Point

pKa

Ka

Average Ka for both trials

Calculations

Trial 1 Ka:

Trial 2 Ka:

Average Ka:[supanova_question]

## English 1 Research Paper Assignment Topic: Write a research paper that shows

Writing Assignment Help English 1 Research Paper Assignment

Topic:

The paper might investigate how digital technologies are influencing:

The field of your career choice.

One specific hobby or interest of yours (such as fashion, sports, gaming, etc.)

The way businesses operate (you will have to focus on one specific aspect of business or one kind of business)

One of the media (film, music, etc.) industries

The development or raising of children

The relationships of family members

The way we meet, develop intimacy, and form relationships (focus on one specific issue with online dating, etc.)

The emotional lives of Internet and/or social media users (focus on just one specific emotional issue in depth)

The way we celebrate, grieve, and/or emotionally express ourselves

The way we think or the structure of the neurons in our brain

How political change (local, national, or international) is brought about

How the news profession operates

The culture/habits of specific age groups or specific ethnic, racial, gender, minority, or religious groups

Privacy or ideas about privacy

Requirements:

The paper must be 7-10 pages in length. No paper under 7 pages will receive a passing grade. 7 pages is the bare minimum, but make sure you write enough to adequately analyze your topic. This page requirement does not include the Works Cited page, which is an additional page.

Correctly use the MLA format for all in-text citations.

Provide a separate Works Cited page that conforms to the MLA guidelines.

Use at least seven documented sources that are well chosen. At least two of your sources must be scholarly journal articles.

Your grade will be determined by five criteria:

The sophistication of your argument.

The clarity of your organization.

The credibility of your research.

The adherence to the MLA rules for in-text citations and a Works Cited.

The quality of your writing.

The argument should offer genuinely informative and insightful claims about the topic that go beyond common sense and common knowledge. The paper needs to be organized into unified paragraphs that flow in a logical and clear manner. The research needs to be undertaken and presented in a way that provides greater sophistication and credibility to your paper’s argument. MLA rules must be followed for all citations and the Works Cited. The writing needs to be grammatically correct and clear.

Research Proposal Guidelines:

Write a description of the specific topic you intend to investigate. Try to outline the issues and debates on the topic that you need to look into. What are the kinds of questions that your research will attempt to answer? The research proposal should be about 1/3 to 1⁄2 a page and also include a Works Cited with two preliminary sources you have found.[supanova_question]