No homework for Science Jim's Classes this week!

Hi folks,

No homework for biology and chemistry this week.  Just study study study.  Best way to do it is to look over ALL those old quizzes.  The test will be based on the old quizzes and anything that's on those quizzes is fair game for the final.  I'm trying to make the final about 1.5 hours long so you may want to have a ride on call in case you finish early.

If you have any questions you want help with don't hesitate to let me know.

Here is the biology blog if you want to look over old recordings or assignments.

Here is the chemistry blog if you want to look over old recordings or assignments.

Good luck everyone!

5/18 Chemistry Recording

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Bit of help with this week's homework

Another thing to look at for this week's homework is electroplating. This may help explain what's happening to the paperclip...or...it may not... :) It's up to you to come up with logical explanations to explain what observations you made during the experiment. Good luck!

Recording of 5/10 Chemistry Class

http://www.youtube.com/watch?v=DhxnPquccnA&feature=em-upload_owner

Review

Hi folks,

This would be a good week to spend some time looking over old quizzes.  Are there any problems or concepts that you are struggling with?  If so, bring them to class.  We can spend some time working through the problems.  Stoichiometry, heat calculations, balancing, naming etc.  It'll all be on the final so now's a good time to take a look to see if you need some help.

Never Stop Wondering

"Science Jim"  Mueller

(919) 929-9791

A Fun Approach to Serious Physics!

Sciencejim

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5/10 Chemistry Update and Homework Due 5/17

Hi folks,

Today was a busy day with two labs and a discussion of reaction rates and endothermic vs. exothermic reactions.  We took a look at just how much water, salt and sugar is in a mole and we also did electrolysis, one of my favorite labs.

Homework for next week is to:

Read pgs. 279 - 300 Don't worry about the #'s and the math.

Investigate electrolysis and create a report telling me:

1. The chemical reactions taking place within the experiment.

2. Why do you think the water changed color?

3. What do you think happened to the paper clip?

4. What do you think happened to the water in the test tube?

5. Why did we need the battery?

6. Why did we need to use salt water?

Never Stop Wondering

"Science Jim"  Mueller

(919) 929-9791

A Fun Approach to Serious Physics!

Sciencejim

Join my Facebook page!

Facebook | Science Jim

4/3 Chemistry update and homework due 4/10

Hi folks,

Today we did a rather wacky lab to try to get a better feel for chemical equations and the concept of stoichiometry. No recording this week since we just did the lab for the entire class.

Homework for next week:
Most of you finished some of this in class but I'd like you to hand in...

1. How many moles of borax did you use?

2. How many moles of glue did you use?

3. How many moles of water did you use?

4. If you wanted to create 1000g of silly putty, (and we all do) how many moles of Borax would you need?

5. How many moles of water would you need?

6. How many moles of glue would you need?

7. If you wanted to create 1000g of silly putty, how many grams of Borax would you need?

8. How many grams of water?

9. How many grams of glue?

(You read about these laws way back in January. They are in chapter 3 if you need review.)
10. This experiment is also a great example of the Law of Conservation of Mass. Tell my why it's such a great example.

11. Not only is it a good example of the Law of Conservation of Mass but it's also a great example of the Law of Definite Proportions. How does this experiment illustrate the law of Definite Proportions?