Gentlemen,
Those interested in the possibility of a Summer internship should click the link below for more information. Those interested in Science should heavily consider some of these opportunities. It is a great way to learn new things, meet new people, work with highly advanced laboratory equipment, and work with prominent figures in their respective field.
If you have any further questions, please see your Chemistry teacher for more information.
https://docs.google.com/a/chaminade-hs.org/document/d/18Abks4RgSfgYTvjZ8MBMVmflxk9XFYcZ6y5orpFpQlA/edit?usp=drive_web
Wednesday, February 25, 2015
Tuesday, January 27, 2015
Updated Science Fair Dates
Please see the following link for changes to the Science Fair dates:
https://mail.google.com/mail/u/1/?ui=2&ik=1cddc930a9&view=att&th=14b2c3c96e8cd672&attid=0.1&disp=safe&realattid=f_i5fi59ns0&zw
https://mail.google.com/mail/u/1/?ui=2&ik=1cddc930a9&view=att&th=14b2c3c96e8cd672&attid=0.1&disp=safe&realattid=f_i5fi59ns0&zw
Monday, October 27, 2014
Science Fair 2015
Chemistry Science Project
You are to choose from one of the following topics and develop your own project using the scientific method-
Hypothesis, Materials, Procedure, Results, Conclusion
Be sure to have a large sampling size (5-8) and perform each part 5-8 times (trials), (control vs variable)
Project: worth 100 points (test grade for 2nd trimester)
Must Include: 1) Poster board- most of this should be covered. Results, charts, graphs, and pictures of you doing the work; include pictures showing all the trials and samples.
2) Your experiments (numerous trials)
3) 3-5 page report on background or information related to your topic and a bibliography.
** Be sure to explain the chemistry involved in your project.
Projects to choose from:
1) Sunscreen effectiveness
2) Water testing (not bottled)
3) Soil Testing
4) Corrosion of metals
5) Acid Rain
6) Laundry detergent effectiveness
Begin Testing ASAP
You may work in groups of two as long as both students are taught by the same teacher. * However, the project will be due at the earliest date between the two students.*
You may be excused from a Science Fair Project if you are on Team A, B, or C of Science Olympiad and compete in events.
Monday, October 13, 2014
Avogadro's Number
As you learn in Chapter 3, Avogadro's number tells you how many atoms, or molecules, there are in 1 mole. The name for this number comes from the Italian physicists Amedeo Avogadro. He proposed the theory that 1 mole of a gas at a specific temperature and pressure has the same number of atoms as 1 mole of a different gas at the same temperature and pressure. This theory was proposed in 1811, but Amedeo Avogadro did not have the technology to determine exactly how many atoms made up 1 mole.
It was actually Jean Perrin who discovered the number in 1895. He showed his respects to Avogadro for coming up with the theory that propelled Perrin to make this discovery. Along with this, Perrin continued his work on atoms and received the Nobel Prize in 1926.
It was actually Jean Perrin who discovered the number in 1895. He showed his respects to Avogadro for coming up with the theory that propelled Perrin to make this discovery. Along with this, Perrin continued his work on atoms and received the Nobel Prize in 1926.
Monday, October 6, 2014
A Fly in the Cathedral
A short while ago, we had discussed the discovery of the nucleus along with the proton. Ernest Rutherford had used his famous Gold-Foil Experiment to come up with this massive breakthrough. In class, we discussed how the atom is made up of mostly empty space and the nucleus is very small in comparison to the rest of the atom. We used the analogy of a marble in Ott Field. This eventually led to the discussion of splitting the atom and the atomic bomb.
The book "A Fly In The Cathedral" is a true story about 20 years after Rutherford's Gold Foil experiment. It describes the race between John Cockcroft and Ernest Walton, other American Scientists and German Scientists to become the first group to split the atom and create the atomic bomb.
This is an interesting read for those who are interested in learning more about this time period and the Science behind it. The book can be found on Amazon.com for 1 cent plus shipping (total is around $4.00).
I would highly recommend this book to all students who have talked about Rutherford and his experiment and are interested in learning the aftershock of his experiments.
Here is the cover of the book:
The book "A Fly In The Cathedral" is a true story about 20 years after Rutherford's Gold Foil experiment. It describes the race between John Cockcroft and Ernest Walton, other American Scientists and German Scientists to become the first group to split the atom and create the atomic bomb.
This is an interesting read for those who are interested in learning more about this time period and the Science behind it. The book can be found on Amazon.com for 1 cent plus shipping (total is around $4.00).
I would highly recommend this book to all students who have talked about Rutherford and his experiment and are interested in learning the aftershock of his experiments.
Here is the cover of the book:
Thursday, June 5, 2014
Comprehensive Exam Review
With the Comprehensive Exam only a few days away, here are some questions to help you practice:
Just a reminder, the Chemistry Exam is Tuesday June 17th.
Just a reminder, the Chemistry Exam is Tuesday June 17th.
2. A cube has a volume of 3.56 cubic centimeters and a mass
of 15.6 grams. The density of the cube is
best expressed as: (Hint: Answer must have correct number of significant
figures.)
a) 0.228 g/mL b)
4.38 g/mL
c) 0.23 g/mL d)
4.382 g/mL
3. Please indicate the number of significant figures for the
following questions:
4000. g
4000 L
33.0 mL
4.00000000000 m
0.00000000000004 mg
48,067 mg
4. Write the electron configuration for potassium.
5. Who was the father of the Periodic Table?
a)
Gregor Mendel c)
John Dalton
b)
Dmitri Mendeleev d)
Ernest Rutherford
6. List the scientists who discovered the subatomic
particles and their tools.
7. Find the percentage composition of Cu2S.
8. Find the empirical formula of a compound made up of
32.38% sodium, 22.65% sulfur, and 44.99% oxygen.
9. Write the Lewis and structural
formula, the type of bond, and the shape of CCl4.
10. How many grams are there in
8.76 x 1017 molecules of ammonium chlorate?
11. Balance the following
equation: C9H20 +O2 à CO2 + H2O
12. How many moles of AlBr3 are produced if I
have 700. grams of Br2, according to the following equation?
Al
+ Br2 à
AlBr3 (unbalanced)
13. If the pressure of a gas is 4364.333 kPa, what is the
gas in atm?
a)
4364.333 atm c)
3.316893 x 106 atm
b)
5.742543 atm d)
43.07262 atm
14. A sample of hydrogen gas occupies a volume of 562 mL at
17oC. What would the volume be if the temperature was increased to
31oC?
15. What is the mass, in kilograms, of 17.8 L of Chlorine
gas at STP?
16. Which principle describes the process of a system to
counter a stress made upon it so that the system can return to equilibrium?
a)
Heisenberg’s Principle c)
Le Chatelier’s Principle
b)
Einstein Principle d)
Equilibrium Principle
17. A solution was prepared using 42.3 g of sugar, C12H22O11,
mixed with 444 g of water. Find the molal concentration of the solution.
18. ***Three part question*** 9.12 L of H2 reacts
with CuO at STP according to the following equation:
CuO
+ H2 à
Cu + H2O
How many moles of H2 react? How many moles of Cu
are produced? How many grams of Cu are produced?
19. C6H12O6 + 6O2
⇌ 6CO2 + 6H2O
+ heat
If
heat was removed to the system above, how would the system react?
a) Shift to the Right c) Stay
the Same
b) Shift to the Left
20.
Why can’t water dissolve oil? What quote did we mention to help
determine when a substance will dissolve another substance?
21. For the following equations, please complete the
following. A) Determine the products. B) List each element as soluble or
insoluble (you can simply put aq or s next to each compound). C) Write the
total ionic equation. D) List the spectator ions. E) Write the net ionic
equation.
sodium carbonate + calcium chloride
22. List the definition of an Arrhenius acid and base,
Bronsted-Lowry acid and bas, and Lewis acid and base. I would prefer a chart.
23. What is
the pH of a solution whose hydronium ion concentration is 3.30
x 10-12?
a) 12.0 b) 11.5
c) 12.5 d) 2.5
24. A 6.7 g
sample of a plastic was heated from 256 K to 279 K and absorbed 49 J of energy
as heat. What is the specific heat of the plastic?
25. For the
reaction: C (s) + O2 (g) à CO2 (g) + 401.24 kJ at 301 K, ∆S= 0.544 kJ/(mol x K).
Will this reaction occur?
26. For
the following equation, please list the oxidation numbers of each element, then
break up into the proper oxidation/reduction reaction with the proper number of
electron either gained or lost. Write neatly or else points will be taken off
for things I cannot read!
3
Cu + 2 HNO3 + 6 H+ → 3 Cu2+ + 2 NO + 4 H2O
27. For this question, please list given, the K formula (without
numbers), show all work (with numbers) and the answer.
For the
following equilibrium equation: 4HCl + O2 ⇌ 2Cl2 + 2H2O
at 650oC, K= 83.4, [HCl]= 5.1 x 10-2 mol/L; [O2]=
3.0 x 10-2 mol/L; and [H2O]= 9.1 x 10-3 mol/L.
What is the concentration of Cl2?
28.
Draw the following compound: 3-ethylheptane
Sunday, April 27, 2014
Future Chemist
I hope everyone enjoyed the Easter break!
Here is a video of a 6 year old on the Jimmy Kimmel Show.
This video will be sure to give you some laughs and amaze you!
Here is a video of a 6 year old on the Jimmy Kimmel Show.
This video will be sure to give you some laughs and amaze you!
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