Thursday, September 23, 2010

LINK

HEre is the link to the POWERPOINT reviews we have seen in class.

http://www.slideshare.net/MRKALEMBER

Wednesday, September 15, 2010

friday sept 17 quiz

This is a sample of what some of the problems on your quiz might look like.

1. How many significant figures are in the number 12.004 ? __________

2. How many sig figs are in the number 0.00004080 ? __________

3. Convert the following. 12km = __________ cm 320 m = __________ cm

4. Rename 3.4E-5 to decimal notation ? ______________________

5. Add the following numbers using sig fig rules 12.4 + 4.5 + 8.66 + 0.0008 = ____________


6. Multiply the following number using sig fig rules. 1,200,300 x 0.0040 = ______________

7. Convert 12 kg/square meter to grams per square cm.



_______________ g/cm2

8. Rename 1203,000,000,000 to scientific notation. ___________________________

9. Convert 3.1 miles to centimeters using unit analysis. (1inch = 2.54 cm, 1 ft = 12 inches, 1 mile = 5280 feet, 1 mile = 1.61km)



____________ cm

Thursday, September 9, 2010

first quiz friday sept 10, good luck!!

here are some practice problems.

4. Convert 86 mm to km ______________________________

5. Aluminum is (circle all that are true) MATTER ELEMENT COMPOUND MIXTURE

6. Convert the following. 12mg = __________ grams 320 mm = __________ cm

7. When aluminum cans are recycled they are first melted. This a PHYSICAL CHEMICAL change.
(circle the right answer in #7)

8. _________ Which statement best describes the conclusion we found when investigating how heart rate is affected by time of exercise? A) as you exercise your heart rate increases, decreases, then increases again B) as your heart rate increases then levels off time you must exercise longer
C) as you exercise longer you breathe harder D) all of these E) none of these


9. __________ If you could break down a chunk of pure gold smaller and smaller and smaller using the world’s sharpest knife you’d eventually have a(n) A)compound B)proton C)element D)atom

10. __________Mountain Dew, the world’s best soda pop, is A) a homogeneous solution B) a heterogeneous solution C) a compound D) an element

11. I measured the length of a bug and got 12.348 mm. Which number am I “unsure” of? ________

12. You are going to conduct an experiment to find out if the pressure inside of a tire is affected by environmental temperature.
A. Which variable will be the INDEPENDENT VARIABLE? ______________
B. Which variable is the DEPENDENT VARIABLE? _________________
C. What is your hypothesis (best guess) for a conclusion for this investigation?

Thursday, March 25, 2010

chap 15 solutions practice quiz

Need some extra practice on colligative properties and solution chemistry? Here is an old quiz i used a couple years ago. I bet your quiz looks quite similar.

Chemistry QUIZ Solutions name _________________________


1. TRUE or FALSE ---- (circle one) The addition of a solute to a solvent causes freezing point depression.
2. GASES dissolve best in
3. How can you make things dissolve faster? List THREE ways.
4. If the solubility of an unknown substance goes UP as temp goes UP it is most like a ________

5. Substance X has a freezing point depression constant of 5 deg C/molal. It is also a molecule, so it has a DF of 1. If substance X has a NORMAL freezing point of -20C, which of the following statements is true? A) It means that a 5 molal solution will freeze at -25C B) it means that a one molal solution will freeze at -15C C) it means that a 5 molal solution will freeze at -21C D) it means that a 5 molal solution will freeze at -25C E) none of these
6. What is the dissociation factor of regular table salt NaCl ? _____________
7. The capital M we use in our calculations means A) moles per liter of solvent B) moles per kilogram of solvent C) moles per liter of solution D) moles per mL of solution
8. True or False Pop is saturated (or maybe even supersaturated) with CO2 but unsaturated with sugar.
9. What was the approximate temperature of the ice/salt mixture that people put there hand in?
10. Describe how to make a 4M solution of NaOH.

11. What has a higher boiling point a 2m solution of CaCl2 or a 3m solution of NaCl? ______________


12. You have 200mL of an8M solution of NaOH. Calculate how many GRAMS of NaOH are in the solution.

13. Calculate the FREEZING and BOILING point of a solution where you have dissolved 80 grams NaCl in 300 grams of water.

14. Use your book’s solubility chart to calculate how much NH4Cl will
dissolve in 300 grams of water at 50C.

Wednesday, March 10, 2010

Heat Of Vaporization Lab

Check out this SlideShare Presentation:

Vocab To Know

Check out this SlideShare Presentation:

Friday, March 5, 2010

CH14 PHASES

I put up all the powerpoint reviews on www.slideshare.net/mrkalember
just a few minutes ago, they should be there. Later I will link them directly to this website so they show up here, but if i forgot, go there instead!!!!

Friday, February 26, 2010

Gas Laws2

Check out this SlideShare Presentation:

Gas Laws

Check out this SlideShare Presentation:

Chapter 13 Wrap Up

Check out this SlideShare Presentation:

GASES CHAP 13 TEST MONDAY March 1st

Hey chemistry peeps, if you blew up a balloon, what do you think would be inside it? Name the four gases -- ??? How about nitrogen, oxygen (yes, you exhale oxygen too), carbon dioxide and water! (yes, water vapor is a gas) Just thought you'd appreciate knowing this !!!! hint hint.

I'm heading over to http://www.slideshare.net/mrkalember to put up some powepoint reviews about gases. If i'm smart enough I'll try to link it directly to this website so its right here. If not, go there!

Good luck, study hard and all hail the BIG LINE

____________________________________________________________________ a big line there.

mr. k.

Tuesday, February 9, 2010

BIG CHEM TEST Wed Feb 10th

Chapter 12, study up. Yout have two review sheets that cover all the different kinds of problems AND take a look at the powerpoints below. Study and good luck. mr. k.

Friday, February 5, 2010

CH 12 TEST soon

Well, we've nearly finished chapter 12. 3 labs, one quiz, lots of homework all done. I'd say we'll tie up loose ends on Monday, review Tuesday, test Wed. or Thursday. That's Feb 10th or 11th for the test. See the powerpoint reviews below for more information if you need help.

Wednesday, January 27, 2010

Ch 12 Energy Introduction

Check out this SlideShare Presentation:

Chemical Reaction Of Heat

Check out this SlideShare Presentation:

QUIZ ENERGY JANUARY 29th.

Here it is, a version of the quiz I used last year. Your quiz will look very similar.

Chem QUIZ Energy Name ________________________________________
SHOW WORK ON CALCULATIONS !

1. In this chapter we are studying energy. Energy is the ability to do __________________ .

2. One calorie = ________ joules

3. 1000 calories = ____________ food calorie or ___________ kcal.

4. What are the most common units scientists use for energy? _______________

4a. These units are really a combination of five S.I. Units. What are they? _________________

5. The specific heat of water is 1.0 cal/gdegC Liquid X has a specific heat of 2 cal/gdegC -- Using this information which statement is correct.
A. The water will heat up twice as slow as liquid X.
B. The water will boil twice as fast as liquid X.
C. Liquid X is two times easier to heat up that water.
D. Liquid X heats up twice as slow as water.

6. A food label says “180 Calories in each 30 gram serving of chips” How much heat will be given off if you burn 3 grams of chips?


________________ Kcal

7. A food label says “160 Calories in each 20 gram serving of cheetos.” If you burn 4 grams of these

cheetos you will be able to heat up ___________ grams of water from 10 deg C to 60 deg C.





8. The pop can we used is called a _________________ by real scientists.

9. In lab you want to heat up 350 g water that starts at 10 deg C. Mass of empty crucible = 12.4 grams, mass of crucible with ethanol = 13.4 grams. Your teacher told you the actual heat of combustion of ethanol is 7 kcal/gram.
If you assume 100% efficiency, what is the final temp of the water? ________ deg C





9. You have just burned 2.6 grams of dried bananas to heat up 220 grams of water from 10 deg C to 42 deg C. Calculate the energy content of dried bananas in Kcal/g


___________ kcal/g

Wednesday, January 6, 2010

QUIZ THURSDAY Jan 7th

chem quiz !! study up.
I've put up helpful review powerpoints on my slideshare acct.
www.slideshare.net/mrkalember

here's an old practice quiz.



SHOW ALL WORK !! (use unit analysis)

When sodium reacts with water it forms sodium hydroxide and hydrogen gas.

2Na + 2 H2O YIELDS 2NaOH + H2

1. If you want to react 12 atoms of Na it will require _____ molecules of water and it will make _______ FU’s NaOH and _______ molecules of H2

2. If 50 grams of sodium is mixed with 30 grams water, which is in excess?

3. How much NaOH will be made ? ______________ grams

4. How much hydrogen gas will be made? ____________ grams

5. How much hydrogen gas will be made? ____________ liters

6. How much of the reactant which is in excess will be LEFT OVER? _________ g

7. If you had 2.5 grams Na reacting with EXCESS water, how many mole hydrogen gas will be made?

Extra credit – If you made 12 liters of hydrogen gas, how many ATOMS of sodium reacted with excess water? Show work !