Hon Chemistry Assignment for Monday, November 12

HON CHEMISTRY: Happy Monday! Here’s your assignment for Monday. Read the instructions below very carefully!! (If you have done this assignment already, do it again – but it’s different! The practice will be very helpful for you!!)

Today you’ll practice again on http://www.sciencegeek.net, but instructions for today are different. Today you will need to write the question, and then beside it, the correct answer, and you must turn in your work on notebook paper – but you only have to do 12 chemical formulas/naming compounds correctly from each of the first three sections below and 2 empirical formulas problems from the last section. When you get the set amount done correctly in each section, you may stop and go on to the next section. Skip a line between each compound. You may write on the back.

Label each new section, and skip a line between each question.

Go to http://www.sciencegeek.net, go to Chemistry, click on NEW Review & do the following. On your notebook paper, write the question, and then beside it, the correct answer. BE SURE AND CHECK YOUR WORK. This assignment will be graded for accuracy.

1) Unit 3: Binary Ionic Compound Formulas (Don’t forget that you DO have to put charges for the ions in the formulas when you show your work!)
2) Unit 3: Ionic Compounds Involving Polyatomic Ions (Don’t forget that you DO have to put charges for the ions in the formulas when you show your work!)
3) Unit 3: Binary Covalent Nomenclature (Don’t forget that you DO NOT put charges for the ions in the formulas when you show your work. Prefixes are the subscripts!)

Next, go to http://www.sciencegeek.net, go to AP Chemistry, click on Review & do 2 problems in the following section. On your notebook paper, write the question, and then underneath it, your work and the correct answer. BE SURE AND CHECK YOUR ANSWER. This assignment will be graded for accuracy.

4) Chapter 3: Stoichiometry – Finding Empirical Formula from Mass Percent (Be sure and include units!!)

The assignment is due at the end of the period. If you finish early, use your time to practice other things for the Chapter 7 Test!

Hon Chemistry 11-8-18 Polymers

HON CHEMISTRY: Oh, my word! We finally finished the chapter! Have you had a chance to check out the Chapter 7 Stuff to Know sheet?

Also amazing – did you realize molecules could be that large? And so many of them! Don’t you think polymers are some pretty unique compounds? Let’s play with them tomorrow!

Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe?

Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg

Hon Chemistry 11-6-18 Empirical & Molecular Formulas

HON CHEMISTRY: Awesome job today!! You just about figured out how to find empirical formulas and molecular formulas all by yourself! I love the way you were able to think through what you knew and what you needed to find a solution!

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! 🙂

flickr photo by Darwin Bell

Hon Chemistry 11-2-18 Percent Composition

HON CHEMISTRY: Great job today! Way to apply chemistry to your everyday life!!

I think you’ll find that percent composition problems are super easy to catch on to. First, though, be sure you know which “type” of percent composition you’re trying to fine. Also make sure you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those chemical names and formulas for common substances. It’s just plug and play from there! 🙂

flickr photo by Τϊζζ¥

Hon Chemistry 11-1-18 Moles of Chalk

CHEMISTRY: All kinds of ways to find the moles of chalk in your name! You set a land speed record for finishing a lab. Good job!

The book homework has changed for tonight and tomorrow night. See below if you didn’t get it in class. Also, the thLAB: Calculating MOles is to be written up as a formal lab report – pictures, etc. Be sure and change the formula for sucrose to the formula that is written in the notes on our syllabus.

Thursday HW Update:
Pg. 246 – 250: 28, 30 – 31, 42 AND do 31 and 42 AGAIN but change the directions to: “Find the number of molecules in each of the following.” (Do b and c only on all)

Friday HW Update:
Pg. 238: Blue Practice 1 – 3 (Middle of page)

Hon Chemistry 10-30-18 Mass to Moles to Molecules

HON CHEMISTRY: Awesome job today using a chemical formula as a tool! I forgot to turn on the mic, so here’s a vodcast from the past. Start it at about 2:36 minutes and ignore the syllabus stuff at the beginning!

So could you find how many molecules in a drop of water? Let’s talk about that tomorrow! P.S. Now you know why it’s so very important to be able to write a correct chemical formula!

Hon Chemistry 10-29-18 Moles, Molar Mass & Avogadro’s Number

HON CHEMISTRY: So….you think if his work helped us understand something as significant as the number of something in a mole they might name something after him? They did! Go figure! Another name for the number of anything in a mole is Avogadro’s Number. That would be how many?

You caught on super fast today! Remember, it’s all in terms of one mole. The mass of one mole, the molar mass, is the average atomic mass of the element in grams (periodic table). And the number of atoms in one mole is …. well you know that. Speaking of moles, isn’t he cute? Well, beauty being in the eye of the beholder and all. Hmmmm………

Image source blog.ibts.eu/wp-content/uploads/2009/02/mole2.jpg

Hon Chemistry 10-25-18 Oxidation Numbers & Help Session

HON CHEMISTRY: So how are the chemical formulas and chemical names coming? With oxidation numbers, you now have a few guidelines to help polish up what you already know!

And don’t forget to add one more thing to your “make sure you memorize for the test” list: polyatomic ions, chemical names and formulas for common substances, binary acids, oxyacids, prefixes, and from today oxidation rules. Oxidation rules! We’ve really already been using oxidation numbers, you just didn’t know it! 🙂

But does it all matter? These complicated rules about naming compounds, I mean. Let’s find out tomorrow in lab!

flickr photo by scottwillis

Hon Chemistry 10-22-18 Formulas with Polyatomic Ions

HON CHEMISTRY: Are you starting to see letter and numbers in your sleep? Here’s our awesome discussion on writing chemical formulas with polyatomic ions. The same………but different?

Tons of memorization for this chapter – monatomic ions, polyatomic ions, and this is just the beginning! Start now!!

Photo by Fabio Santaniello Bruun on Unsplash