Hon Chemistry 10-19-12 Mole Problems & Moles of Chalk Lab

HON CHEMISTRY: Great job on the moles of chalk lab! You set a land speed record for finishing a lab. Good job! At the end of the vodcast, there are instructions for the lab, just in case you were out today. By the way, the lab can be written up on a sheet of paper instead of in your lab books.

How are you doing on the mole problems? Here is the review we did of some of last night’s homework problem. Remember that one of the answers that I listed at the very beginning is wrong – but we corrected that during class.

Speaking of labs, the thLAB: Calculating Moles (the one with the salt and sugar packets) can also be written on a sheet of paper. Make sure you include all your observations (data in a table!), calculations, and answer all the questions. I thought these couple of labs would be a different way for you to practice the whole mole concept. Have a great weekend!!


Chemistry 10-19-12 Chemical Formulas with Polyatomic Ions

CHEMISTRY: Great job today! Do you understand better now? Remember – baby steps, first binary ionic compounds, and now, formulas with polyatomic ions. Begin learning them now! And practice, practice, practice!!

Speaking of practice – did you get the homework for this weekend? Two things: first, finish #2 – 8 at the end of chapter 7. Second thing, do the online Chemical Formula & Names Practice: Go to http://www.sciencegeek.net and …

  • Click on Chemistry Review and scroll down to Unit 4
  • Practice each of these three activities on writing and naming chemical formulas: Writing Compound Formulas #1, Binary Covalent Nomenclature, and Writing Compound Form. #2

Last thing, click here for a copy of the Hints for Naming Chemical Formulas Flow Chart. And have a great weekend!!

flickr photo by skycaptaintwo


Physics 10-19-12 Forces & Newton’s Law of Inertia

PHYSICS: Great first day of chapter 4! So what’s your theory about the cause of motion? And remind me again why didn’t that pen go flying across the room instead of dropping into the bottle? I love Newton’s first law – the law of inertia! Where else do you see it in action in your world?

So, let’s play with this concept on Monday. Can you use what you know about mass and inertia to find the mass of an unknown object? I know you can! 🙂