HONORS CHEMISTRY: God bless you as you study for the test! Here’s our overview of the test from today.
Have you been using the “Chapter 7 Stuff to Know & Know How to Do” sheet? It’s a great way to get organized in studying for the test. I know it seems like a lot, but you can do it!
First priority – make sure that you have memorized EVERYTHING. Then, go to The Physics Classroom and/or sciencegeek.net and make sure you can write and name chemical formulas. Practice, practice, practice!!! Then start practicing the different kinds of problems – do at least three of each one of them. And also try those on sciencegeek.net. That’s always some good practice. God bless – I’ll be praying for you!
PHYSICS: From Tuesday – here’s our look at a few of the homework problems using the conservation of energy and work – #46 – 48, the skier pulled up the slope, the ski jumper, and the suitcase sliding down an incline to rest.
I LOVE the way you started thinking through these. Don’t give up on them. Treat them like a multi-layer puzzle. 🙂
CHEMISTRY: One man’s rust is another student’s lesson in chemistry! Great job today with oxidation numbers. Now it’s time to go and practice applying them! Try to do your homework without your notes first. Then go back and check and see what you actually knew. Great way to check up on yourself.
CHEMISTRY: God bless you as you study! Here’s our overview and practice for the test from today and some GREAT last reminders for your notes.
First priority – make sure that you have memorized EVERYTHING. Then, practice!!! Go to sciencegeek.net and make sure you can write and name chemical formulas. Practice, practice, practice!!! Another great practice is re-doing The Physics Classroom. Just don’t log in – redo it as a guest.
HON CHEMISTRY: Are you starting to figure out the steps of working empirical and molecular formula problems? First – a heads up on the virtual lab for Friday, and then a quick overview of some of the homework problems from last night.
My best advice on this – don’t round! Or at least don’t round too much – carry decimals out to two or three places. And PRACTICE these same problems over and over until you get them!
HON CHEMISTRY: Now that you know how to write chemical formulas, you are going to be amazed at what you can do with them! I love the way you are able to think through what you know and what you need to find a solution. Today you are going to use that to find empirical formulas and molecular formulas all by yourself – well, almost by yourself. 🙂
Be sure and practice – if you don’t it’ll get all turned around and you’ll end up leaving off an important step. The hardest part is that it’s not a set formula for you to plug and play, but if you’ll keep in mind that you’re really just looking for subscripts which are just moles, you’ll be able to think it through. Percent to mass, mass to moles, moles to smallest whole number ratio.
Are you starting to catch on to the steps? It will be good for you to memorize them, but would it not be just tons better to understand why you need each step – backwards and forwards, so then you wouldn’t need to memorize them at all!
And then, also remember what molecular formulas are – just a multiple of the empirical formula. Keep that concept in mind, and you’ll have no problem remembering to divide the molecular formula mass by the empirical formula mass to find X! Easy peasy! 🙂
CHEMISTRY: Do you feel like you have letter and numbers swimming in your eyes? This is one of those times that paying attention to details is super, super important! Here’s the lecture from Tuesday on writing formulas and names for binary molecular compounds. Part of it’s really similar to what you learned to do for ionic compounds, but another part is totally different. Details!!
Make sure you keep everything straight. Do something that will organize all the information for you, so you won’t get confused. Also, don’t forget the lists you have to memorize – it’s getting larger and larger!! And practice, practice, practice!!!