Chemistry 9-12-17 Relationships Among Data

CHEMISTRY – Can you believe it? We’ve almost finished the chapter! Here’s the lecture from today on direct and inverse proportions.

Speaking of tests, have you gone to the TEST Info tab yet? You might find something that will help a lot as you study!!!

Also, don’t forget to check out the Interactive Review Games with your online text and also the review at sciencegeek.net. Great practice with both memorization, concepts and problem solving!

God bless you as you study this week! I’m be praying for you!!

Chemistry 9-11-17 Homework Conversion Factor Problems, etc.

CHEMISTRY: Here is our discussion from today of some of the conversion factor problems from the homework.

IMPORTANT: Do you need to redo these? If you found yourself today writing all over what you had written last night, then YES you do! Remember you want to get great at working these yourself, not just get great at watching me work them!


flickr photo by Enokson

Reg & Hon Chemistry 9-6-17 Homework & Conversion Factor Problems, Etc.

REG & HON CHEMISTRY: Short class, but great job with our start on using conversion factors to work advanced problems! It’s good to able to convert from one unit to another, but can you use that info to solve a real world problem?

Remember, this isn’t just about getting an answer – some of you can do that in your head. This is about being able to convert from one unit to another using the Q-formula. (And yes, you have to do it that way!). Now go forth and conquer!


flickr photo by A. Jarrett

Chemistry 9-5-17 Conversion Factors

CHEMISTRY: Great job with our start on using conversion factors to work problems! Hopefully this was a review from your earlier academic life. We’ll crank it up a notch tomorrow!! πŸ˜‰

Remember, this isn’t just about getting an answer – some of you can do that in your head. This is about being able to convert from one unit to another using the Q-formula. (And yes, you have to do it that way!)

Make sure you practice using your notes tonight, it’ll help you remember the steps we followed today in class!

If you need more practice on these or other problems – HELP SESSION tomorrow morning, Wednesday, 7:20ish A.M.


flickr photo by vnysia

Chemistry 8-31-17 Using Density

CHEMISTRY – Hey guys, here’s a pic of some “high density” koi that I saw in Hawaii (at the Dole Pineapple Plantation, of all places!). Great review on density problems today, and more! Remember, in chemistry we use math as a tool, therefore we might work problems a little differently in chemistry than you do in your math class.

When working these problems, don’t forget to follow the problem solving steps we discussed today:

  • Analyze – write down what you’re given and what you’re looking for
  • Plan – write a formula where you isolate the unknown on one side by itself
  • Compute – plug in your data, numbers and units; then cancel the units, and if they cancel correctly, go on to the calculator. Be sure and give your answer what the correct units.
  • Evaluate – does your answer make sense, have you used the correct units, do you have the correct sig figs?

On a more practical side – and even better(!), can you now use what you’ve learned about density? Be sure and print the lab for tomorrow – thLAB: Building Your Balance.

Can’t wait to “watch” you work!

Chemistry 8-29-17 Significant Figures, Pt. 2 & Scientific Notation

CHEMISTRY – I like the way you are catching on to significant figures! Here are the last of the notes on calculating with Sig Figs!

And great job with scientific notation today! Did you realize your calculator was so smart? Have you conquered it yet?

Remember, the best way to really learn all of the things from this chapter is practice, practice, practice! That’s the reason it’s so important to do your homework! I give it to you so you can practice and put together all we talked about in class ….cuz I love you! πŸ™‚

Also super important – SI quiz tomorrow! Make sure you are actively studying for it, not just looking over it!!


flickr photo by Robert S Donovan

Chemistry 8-25-17 Accuracy and Precision & Intro to Significant Figures

CHEMISTRY – So which is more important, accuracy or precision? Great discussion on causes of error in the lab and how to prevent them! Since we’re having server and Internet issues, I’m posting a vodcast from a few years ago.

So you’ve been using been using significant figures all along when you were measuring in the lab! Now the other half – using them in calculations will be no big deal at all!

Hey – how is the Scavenger hunt going? Did you notice I’ve extended the deadline? Check out the new due date on the syllabus. Make double sure you give yourself plenty of time!!

And don’t forget to be studying for the SI quiz!!


flickr photo by jambe

Chemistry 8-24-17 Derived Units & Intro to Accuracy & Precision

CHEMISTRY – So you think Goodman Road is getting crowded? How’s this for a “high density” city? Great work with derived units today. Now on to accuracy and precision. Can you apply what you’ve learned? Hmmmmm………


flickr photo by chromogenic

Chemistry 8-23-17 SI Measurements

CHEMISTRY – Hey guys, so is all the info on SI measurements starting to come back to you? Here’s the lecture from today. I’m sure it’s mostly review from your physical science days, but it’s a great opportunity to refresh what you’ve learned and to get ready to begin using it!

Did you remember the prefixes? Start work on memorizing them NOW – Si quantities, units, and SI prefixes. For the prefixes, also make sure that you can tell me how many of something in the larger one. (That’s what I explained in class.) The quiz on them will be next Wednesday, August 30.


flickr photo by Nils Geylen