Chemistry September 24/09

Today in Chemistry 11 we learned what matter was in general and in how many various states it can exist. ex. Solid, liquid, gas, plasma. We also learned 2 new forms, Aqueous and amorphous, where aqueous is something dissolved in water, and amorphous is something lacking definite form (shapeless). We also learned about the strength of the bonds between the forms and the 3 categories of changes:
-physical change ex. crushing tearing etc.
-chemical change ex. cooking rusting etc.
-nuclear change ex. no example, but assuming nuclear decay
We learned that in physical change, the shape or state of matter changes, and that changing from a solid to gas is often confused as a chemical reaction. We then learned that in a chemical change, a new substance is formed, the properties of matter change, and that it could change the conductivity, acidity etc. We also briefly learned the law of conservation of matter.


Quick summary:
-what is matter? Anything that occupies space and has mass
-Matter can exist in many forms: solid, liquid, gas, plasma, amorphous, aqueous
-bond strength from strongest to weakest: solid, liquid, gas, plasma
-Physical change is the change of shape or state of matter
-Chemical change is the change of the properties of matter and when new substances are formed
-Law of conservation of matter states that matter, like energy, is neither created or destroyed in any process

heres a neat explanation of a solid, liquid, gas website online
http://sciencecastle.com/sc/index.php/articles/view/2100
and heres one talking about chemical and physical changes
http://www.chem4kids.com/files/matter_chemphys.html

Chemistry September 22/09

Today in class we had our chapter 1 test. It covered:

percentage error
scientific notation
conversion
WHMIS
lab materials
significant digits

Chemistry September 18/09

In chemistry 11 today we did a lab. The lab was to find out how much salt can dissolve in 40ml of water. We had to put salt in bit by bit into the water and stir it, until we could not see anymore salt at the bottom of the water. When salt still remained at the bottom that means that the water could no longer dissolve anymore amount of salt. The amount of salt that could be dissolved in 40ml of water was 11.5grams of salt. The procedure for this lab can be found on the following website.
http://www.ehow.com/how_5074919_dissolve-salt-water.html

We also learned about the basics of graphing today. We would have to know this because Mr.Doktor had wanted us to graph our results on paper. He specifically said on your graph you must have at least 5 basic elements, those are:
1. Title
2. Labeled axis
3. Correct scaled axis
4. Data plotted correctly
5. Best-fit line

Chemistry Class Number Two September 16/09

Today in chemistry we learned about conversions(dimension analysis) and the SI unit system.
Example: 1L --> ?mL 1L = 1000ml
to find out more about conversion you can have a look at the following website.
http://www.purplemath.com/modules/units.htm

	SI unit system
Giga-	billion	G	109
Mega-	million	M	106
kilo-	thousand	k	103
centi-	hundredths of	c	10-2
milli-	thousandths of	m	10-3
micro-	millionths of	µ	10-6
nano-	billionths of	n	10-9
pico-	trillionths of	p	10-12

We also learned that we will be doing a lab next class on how much salt can dissolve in 40ml of water. We are learning more and more each chemistry class and things are geting harder to do. We will need to know how to do these conversions for our chapter test on tuesday.

Chemistry Septermber 14/09

In our first class of chemistry we learned about significant digits.
For example: 3.14= 3 significant digits
2.0= 2 significant digits
2 = 1 significant digit
We also learned about scientific notation.
For Example: 145,000,000,000 = 10<sup>11

To learn more about significant digits you can have a look at this website.
http://www.physics.uoguelph.ca/tutorials/sig_fig/SIG_dig.htm
To find out more about scientific notation you can check out this website.
http://www.nyu.edu/pages/mathmol/textbook/scinot.html</sup>