Tuesday, February 24, 2009

For tomorrow, Feb 25:

On a 3x5 notecard, write down 3 questions you have about the homework problems. We will discuss these questions first among a group of 3 and then as a class. These cards will be collected.

HL ONLY Food Chemistry Homework Problems

Due tomorrow (Feb. 25):
1- Sketch the chain structures of a monosaccharide that is an aldehyde and of a monosaccharide that is a ketone. Do these sugars actually exist in straight chain form in the aqueous solutions of the body?

2- Sketch the straight chain structures of the following monosaccharides:
a- glucose b- ribose c- ribulose d- galactose

3- What is a disaccharide? What monosaccharide units make up sucrose? What is the bond called that forms between disaccharides and what is a biproduct of this bond?



In addtion, answer the following (due Fri, Feb 27):
p. 1051

#100, #83, #85, #93, #94

Monday, February 23, 2009

Design Lab

Design Lab 1:
Investigate (quantitatively) a factor affecting the rate of a
reaction.

Dependent:
Change in concentration, volume of gas, intensity of colour, etc.

Design Lab 2:
Investigate a factor affecting the viscosity of a liquid.

Dependent:
Time taken to flow through a burette or pipette (or similar).

Please see IB Lab Rubric for specific instructions and stay tuned in class for more details.

Saturday, February 21, 2009

Virtual Labs

All 4 labs are due on Friday, February 27, at the beginning of class and online at 11:59pm on Friday evening. Each lab will be a separate document but will be turned in as one packet. Each lab should contain the title and the purpose as listed in the lab instructions. The next section should be either the Data or Conclusion, depending on what is required. You will also need to include a works cited section and be sure to cite any sources you use in addition to the lab instructions.

I HIGHLY encourage you to look at the IB rubric BEFORE you write the report. Please pay careful attention to what you are being graded on.

Info for citation: (refer to handbook or online for proper format)
Title- Virtual Chem Lab CD-ROM
developed by Brigham Young University for use with Prentice Hall Chemistry
software developers- Brian F. Woodfield, Matthew C. Asplund
record sheet writer- Steven Haderlie
publisher- Prentice Hall
Year- 2005

Wednesday, February 4, 2009

Just kidding 5th period :-)

Today's "test" will not count. Friday you will take the real test. We will go over the answers tomorrow in class along with the practice problem posted on the website. You should also take a look at the suggested homework problems (posted on the board yesterday) p. 1048 # 62, 65-67. See you tomorrow.

Smile,
Ms. Marostica

Monday, February 2, 2009

O-Chem Help

If you need some additional resources for o-chem, the following website has helpful information on mechanisms and reactions:

http://www.chemhelper.com/mechanisms.html

To review for the test, we will be making a study guide in class which will summarize the reactions we have covered. These will include reactions with
1-Alkanes
a. radical substitution (know mech)
b. dehydrogenation
2-Alkenes
a. hydrogenation
b. addition of acids (H-X) and halogens (X2) [know mech]
c. polymer addition (to be covered tomorrow) [know mech]
3-Halogenoalkanes nucleophillic addition reactions
a. primary [SN2]
b. secondary [SN1 and SN2]
c. tertiary [SN1]
4-oxidation of alcohols [know reagents used]
a. primary --> aldehyde --> carboxylic acid
b. secondary --> ketone
c. tertiary --> no rxn
5-polymers (addition rxns of alkenes) to be covered tomorrow
a. margarine
b. ethene --> ethanol
c. plastics (PVC)

To get the most out of tomorrow, you should start going over your notes and categorizing the reactions under those 5 titles. Post any questions on the blog. You should be looking over these reactions nightly. This is organic chemistry, it's not supposed to be easy. Do not expect yourself to understand it and remember it if you only look at it in class. It will require time outside of class.

See you tomorrow,
Ms. Marostica