10/27/2006

Hi class,
we will go over acids and bases on tuesday. I am also going to start testing your reading, as I know some of you aren't reading your books.

10/23/2006

Hi class,
On Wednesday, 10/25/2006, your worksheet will be due. Also start studying for your polyatomic ion test Friday:
You must know the following:
CN -1 Cyanide
PO4 -3 Phosphate
SO4 -2 Sulfate
OH -1 Hydroxide
NO3 -1 Nitrate
CO3 -2 Carbonate
NH4 +1 Ammonium
C2H3O2 -1 Acetate (also written CH2COO-)
MnO4 -1 Permaganate
ClO4 -1 Perchlorate
ClO3 -1 Chlorate
Remeber you should be working on your problem set as we go along in this chapter.

10/19/2006

You should begin working on your homework sets, up to question 17. ALos your thesis statements are due for those of your not doing symposium. Email to me at Pualeilehua@gmail.com

Chapter 4 homework set

YOUR HOMEWORK SET FOR CHAPTER 4 IS:

#15,17,21,23,29,31,35,39,41,47,49,51,53,55,59,61,67,69,71,73,79,81,83,85.

DUE DATEIS THE DATE YOUR NEXT TAKE EXAM FOR CHAPTER 4 IS DUE, WHICH WILL BE ANNOUNCED.

Take home exam 3 copy

Name:_____________________________
Take Home Exam
1. Balance the following reactions
1. I2O5 + CO ↔ I2 + CO2
2. NO2 + O3 ↔ N2O5 + O2
3. CS2 + CL2 ↔ CCL4 + S2Cl2
4. NaCl + H2SO4 ↔ Na2SO4 + HCl
5. WO3 + H2 ↔ W + H2O
6. CO2 + H2O ↔ C6H12O6 + O2
7. P4O10 + H2O ↔ H3PO4
8. C5H12 ↔ C5H8 + H2
9. As2O3 + C ↔ CO2 + As
10. Al2O3 ↔ Al + O2
2. N2 (g) + 3H2 ↔ 2 NH3
1. How many moles of NH3 can be produced from 5.25 mol of N2?
2. How many moles of N2 will react with .7 moles of H2?
3. 9.0 moles of NH3 can be produced from how many moles of N2?

3. CaC2 (g) + 2 H2O (l) ↔ C2H2 (g) + Ca(OH)2 (s)
1. Calculate the formula mass for each chemical in the reaction.
2. 62.4 g CaC2 reacts with excess water to yield how many grams of Ca(OH)2?
3. 62.4 g CaC2 reacts with excess water to yield how many liters of C2H2?
4. How many ml of water is consumed in the above reaction? (the density of water

is .98 g/ml for this problem)

4. Fe2O3 (s) + 3 C (s) ↔ 2 Fe (s) + 3 CO (g)
1. 92.7 g Fe2O3 reacts with 16 g C. Identify the limiting reactant and give the theoretical
yield (in moles) of each product.
2. 215.6 g Fe2O3 reacts with 94.7 g C. Identify the limiting reactant and calculate the
theoretical yield of CO in liters.
3. If the percent yield of CO is 85.2% calculate the actual yield of CO (in liters) from #2.
4. If 82.7 liters CO of were actually recovered in problem #2 calculate the percent yield.

Test help

Hi class,
Here is some test help
Question 3-3.
The density of ethyne also known as acetylene is 0.001097 grams per mL.

Question 3-4.
The density of water is .98 mg/ml. This value is shown at the end of question 4. You do not need it for question 4.

Question 4-3
Density of CO is 1.145 grams per liter

Question 4-4 should read:
If 82.7 liters of CO were actually recovered in problem #2 calculate the percent yield.

Hope this helps you all.

10/4/2006 homework

Remember your homework sets, and take home exam are due on Wednesday 10/11/2006, and your lab on 10/6/2006.

Don't forget

Lab reports due on 10/12/2006. Also bring completed homework for Chapter 3 to class for disussion as well as worksheet. We will review for the test which will the following week, 10/16/2006.

Chapter 3 problems were:
Set #1{11, 12,13, 14, 19, 20, 21, 22}
Set #2{ }
Set #3{49, 50, 59, 60, 63, 64, 71, 72, 77, 78}