More Chemical Reaction Classification

More Chemical Reaction Classification
Post by Pam H.

Homework and Review
For Friday, we had to complete the Classifying Chemical Reactions packet, which went along with our lab.  Listed below are the problems that the class had trouble on.

Second Page
Reaction #7: HCl (aq) + NaOH (aq) ----> H2O (l) + NaCl (aq)

2d. Decomposition: CaCO3 (s) -----> CaO(s) + CO2 (q)

Third Page
6.  Sulfur dioxide gas reacts with oxygen on a platinum catalyst surface to produce sulfur trioxide gas.
2SO2 (g) + O2 (g) ---> 2SO3

8.  Heating solid nickel chloride dihydrate yields solid nickel chloride and water vapor.
NiCl2 * 2H2O (s) ---> NiCl2 (s) + 2H2O (g)

If you have any further questions on these problems, or other problems from the lab, feel free to talk to Mrs. Friedmann or visit the TLC.

We also took a short quiz Friday, so if you were absent talk to Mrs. Friedmann about making it up.

Homework
The homework for this weekend is to watch the video called "Stoichiometry: Chemistry for Massive Creatures" and to take notes on it.  You can find this video by logging into Moodle and looking on the right hand side of the page.  If you're having trouble finding it, there is a picture attached below of what to look for. 

The next scribe author is Ashley M. 

Worksheet Answers and Quiz

For class on 9-6-13
Scribe Author: Pam H.

Today in class we:

• Checked in and went over the "Practice-Unit Conversions, Dimensional Analysis, Significant Figures, Measurement Capacity" worksheet
• Picked up the Chapter 1.3-Properties of Substances worksheet
• Took a quiz

Answers to the homework

1.  191.6 g, 38,500 g, 7.0x10^2 J, 2.7x10^-2 
2. 161,000 cm
3. 0.0568 mi
4. 8 fluid ounces
5. Station Number        Instrument                            Reading (Left and Right)

                    1                                Buret                                  7.65 mL          20.90 mL

                    2                          600 mL Beaker                      330 mL            310 mL

                    3                          100 mL Beaker                      41 mL              50 mL

                    4                 10 mL Graduated Cylinder           6.10 mL           4.90 mL

                    5                                Ruler                                 10.95 in           11.60 in 

                    6              Thermometer (Degrees Celsius)      22.0                 21.0

    6.  a) No, the measurements are not the true value.

         b) Yes, all of the measurements are similar to each other.

    7.  14 cm

    8.  Scientific Notation            Standard Notation              Significant Figures

             4.3301x10^-5                      0.000043301                                   5

               2.67x10^5                             267,000                                         3

                5.0x10^3                                5,000.                                          4

    9.  502,000 chromebooks

   10.  YES!

Remember:

• You will be given time on Monday to finish your quiz if you didn't do so on Friday.  If you already turned it in, you will be able to use that time to look over your answers. 
• If you missed the quiz Friday, make sure you talk to Mrs. Friedmann about making it up.

The next scribe author is: Georgia A.