Monday, June 15, 2009

Finals Study Guide

Download the Complete Study Guide HERE: study guide

You can find selected answers HERE: study guide answers

Friday, June 12, 2009

Heating Curves and Phase Diagrams

Please visit the following website and scroll down until you get to 11.6: Heating Curves.

Click on the link and go through the tutorial with your partner.

And after our demo on Carbon Dioxide, click on this link again and go down to 9.7: Phase Diagrams.

Wednesday, June 10, 2009

Heating Curve for Water

Look below for the sample chart of data from today's lab:


Use this graph to help you complete your HW.

Here is a copy of some raw data:

Monday, June 8, 2009

pH and Titrations Review Problems

4a.) The hydronium concentration is greater than the hydroxide concentration.

6.) a. neutral
b. basic
c. neutral
d. acidic
e. neutral
f. acidic
g. basic

8.) a. hydronium conc = 3.0 x 10-2 M, hydroxide conc = 3.3 x 10-13 M
c. hydronium conc = 5.0 x 10-3 M, hydroxide conc = 2.0 x 10-12 M

9.) a. 2.00
b. 3.00
c. 5.00
d. 4.00

11.) a. 12.00
b. 11.00
c. 10.00

13.) a. 1 x 10-3 M
b. 1 x 10-7 M
c. 1 x 10-11 M
d. 1 x 10-5 M

15.)a. 5.9 x 10-5 M
b. 2.2 x 10-8 M
c. 3.3 x 10-10 M

16.) a. 2.0 x 10-3 M
b. 5.0 x 10-12 M
c. 1.1 x 10-2 mol HNO3
d. 0.69 g HNO3

20.) a. The end point is reached when the unknown solution has been completely neutralized. This happens when the two substances (acid and base) are present in chemically equivalent amounts.
b. The indicator is present to change colors when the end point is reached.

24. a. 1.0 mol NaOH
b. 0.75 mol HNO3
c. 0.10 mol Ba(OH)2
d. 0.90 mol H2SO4

25.) 7.50 x 10-2 M KOH

26.) 3.02 x 10-2 M HNO3

Monday, May 11, 2009

Weak vs Strong Acids

Please click on the link above and take notes on the tutorial on your HW from last night. How does it compare with the paragraph that you wrote?

Thursday, April 2, 2009

Gas Law Problems - Answers

As always, please email with questions:

1. 466 mL
2. 461 mL
3. 539 mL
4. 53.4 g/mol
5. 673 mL
6. 325 mL
7. 0.935 atm
8. 0.635 g SO2
9. 785 mL
10. 1.02 L
11. 436 mL

Tuesday, March 3, 2009

Creating ID for Online HW

Student Quest (UT) Website Instructions

1. Log onto
2. Click on Getting Started.
3. Click on I need a UT ID
4. Click on Get a UT ID.
5. Click on Continue.
6. Choose all No’s and Continue.
7. Fill in your personal info and click on Continue.
8. I’m not sure how you get your user id and password, but I presume that they email it to you.
9. Once you have a user id and password, repeat the first two steps above, but then type in your user id and password and log in.

After logging in with User ID and password, go to:
Click "Get Started" or "My Courses"

10. Then click on Enroll in New Course.
11. Type in 5119 in course number and then click on lookup course info.
12. Click on Request Enrollment.
13. Click on assignment Mole Ratio Practice and try to answer each question.
14. Your grade for your next few assignments will be based on your grade on-line, but you can retry a problem when you get it wrong.

Tuesday, February 10, 2009

Answers to Selected Questions from "Writing Chemical Equations"

1. 2Cu + O2 → 2CuO

3. (NH4)2CO3 → 2NH3 + CO2(g) + H2O

5. Ca + 2H2O → Ca(OH)2 + H2

7. 4Cu + O2 → 2Cu2O

Wednesday, January 7, 2009

List of Polyatomic Ions

Selected Compound Formulas from Mole Mass Calculations

1.c. NH4C2H3O2

1.f. K2SO4

2.c. Ca3(PO4)2

2.e. Fe2(CO3)3

If you are having serious trouble with finding the formulas for these compounds, you can try looking up their names on the internet. However, make sure that if you can't do chemical formulas that you come to tutoring on Thursday.