Comparing Amounts using the Mole Concept
Overview
This activity is an instructional activity that can be used in AP Chemistry with Topic 1.1. The activity has students arrange samples with different units in three different ways to show that they know how to perform different mole problem calculations.
Reviewing the Mole
Students should have learned about the Mole Concept in first-year Chemistry. A couple topics they will need to know are how to calculate Molar Mass and how to perform basic mole problems. The links provided are to video playlists where students can choose videos to watch to review concepts previously learned. If students need review, they can pick and choose videos to help them re-learn material.
In first-year Chemistry, you learned how to calculate Molar Mass from a chemical formula using the Periodic Table. You used the Mole Concept to convert from representative particles (atoms, ions or molecules) to moles to grams.
Do you remember how to do this types of problems?
The following are You Tube video playlists - please choose at least one video from each playlist to help you review these concepts.
Practice
These practice links are Quizizz solo practice links. Students should show work on paper in case they need help when a problem is incorrect. The practice is auto-checked by Quizizz so students get immediate feedback on their work.
Now that you've reviewed a bit, try some practice to make sure you're on the right track!
If you need any help on the practice, ask for help from your classmates or your teacher!
Think, Pair, Share
In this activity, students will make a copy of this document: 1.1 Think Pair Share Activity
You will need to assign each student a letter (A-F), so they know what data set to use.
They will need to rank the data in three different manners:
- Increasing number of particles
- Increasing mass
- Increasing mole amounts
While they are working, they should be writing their work down on paper to help them defend their answers and for you to check that they're doing the correct process.
When they are done, have them match up with someone that had the same letter first - then they can check to see if they got the same answers. After that, have them pair with someone that had a different letter to see how they did their work.
Remind students that there is always more than one way to get to the same answer!
Here is a link with the answers to the Google Slides: 1.1 Think Pair Share Answers
Now that you've complete a little bit of practice, let's see how you are doing!
To complete this activity, click on the following link (it will force you to make your own copy)
1.1 AP Chemistry Think Pair Share Activity
Your instructor will give you a letter (A-F), find that slide in the Google Slide Deck you just made a copy of.
Once you've located your samples, use your knowledge of the mole concept to rank your samples in three ways:
- Increasing number of particles
- Increasing mass
- Increasing mole amounts
When you have that completed, find a partner to share your answers with. Be ready to defend your answers with calculations!
Assessment
This assessment will help you see the work that each student is doing plus the answer to check for understanding. Be sure to have them show all work!
If you are in person, they can hand the work in for you to physically check.
If you are virtual, create a space on your LMS to have them take a picture and submit their work. (Be sure to do this before giving the assessment) Other virtual ideas: use Flipgrid to have them video tape themselves doing their problems, type problems into a Google form and have them only type the answer in, enter questions into an LMS.
Choose TWO of the following problems.
Record all work and your answer on a piece of paper.
How many atoms are there in 0.80 g of krypton?
How many molecules are there in 0.400 g of carbon tetrachloride, CCl4?
How many moles of iron are there in 0.220 g of iron?
What is the mass of two moles of calcium atoms?
How many moles of Ca will it take to have a mass of 20.0 grams?
Take a picture of your work and submit it where your teacher asks you to submit it. Be sure to include the question number with your work! And do not forget to label your answer!!