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Unit 2 - Describing Chemical Change

As we continue the "story" of Chemistry, Unit 2 will focus on what lies at the heart of chemistry - chemical change. We will learn how to describe the changes that take place using both verbal and formulaic representations. We begin the unit learning how to name all types of compounds. From there, we will learn about chemical reactions and how to recognize them and balance them. Finally we will learn the various types of reactions and describe reactions according to both type and their balanced chemcial equations. It is not a lengthy unit so don't relax too much. We will be testing on about the 7th block of the unit.

The End is Near!

The End is NearThe Unit 2 Test is scheduled for Thursday, October 17. There are 17 Multiple Choice questions covering basic conceptual comprehension (34 pts). There are 2 questions with 6 parts each that involve names and formulas (24 pts). There are 8 questions in which you must read about a reaction description and write a balanced chemical equation; the best 7 scores will be counted (28 pts). Finally, there are two questions in which you must write a molecular equation and a net ionic equation for a precipitation reaction (16 pts). That totals to 102 pts; we will just make 100 pts a perfect score.

Lab Notebooks will be collected on the day of the test.

Here Ye! Here Ye!

Lab notebooks will be collected on Test day: Thursday, October 17. The following labs will be graded:

Google Classroom

It's time to get going on Google Classroom. It will be used primarily for the submission of labs and projects. Our course page at (this one) will continue to be the headquarters of the course. Join the Classroom with the following codes:

Block 1: bga6y9c

Block 2:  dagctp

Unit 2 Quiz Key

The KEY to the Names and Formulas Quiz from Thursday, September 26 is here.

Lab DCC2 Data:

You can view the class data for Lab DCC2 with the following link:

What About Those WebAssign Throwouts?

Every 9 weeks, I will throw out your three lowest WebAssigns. This does not happen until the 9 weeks are up as there is no way to anticipate which three scores will be the lowest scores.

Need Practice ... Sprinkled with Some Dataways?

Need practice on names and formulas... sprinkled with some Dataways and an occassional Trophy. Try these these Concept Builders.

Names to Formulas 1 Concept Builder

Names to Formulas 2 Concept Builder

Balancing Chemical Equations

Chemical Reaction Types

Writing Balanced Chemical Equations

Good Stuff on the Periodic Table

Ahmed Malik presents ...

More About WebAssigns

There will be two types of WebAssigns: Reading Guides and Practice Assignments. They are set up quite differently. Reading Guides will allow one attempt per question; you will not reeceive feedback until after the due date. They will be discussed after completion. They are graded very leniently; that is, your grade on the assignment will be much better than your grade on the WebAssign; think of them as being abnormally curved. NEVER worry about what your grade is on a Reading Guide; leave that worry up to me. Practice Assignments are the second type of WebAssign. You are more accustomed to this type from Physics. You receive immediate feedback. You are allowed multiple attempts. And your grade on the WebAssign is (for the most part) your grade on the assignment.

    Online Homework


This page changes nearly every day; re-load or refresh to receive the most recent schedule.

Today in Class

>> Tuesday, October 15 <<

Focus Question(s):
  • What is the average atomic mass and how is it determined?
  • How do we count the number of atoms in a sample of matter?

  • Concept Builder: Writing Balanced Chemical Equations (All 3 activities)
  • Demo Inertia, Mass, Force, Atomic Mass Spectroscopy
  • Discuss Atomic Mass Spectroscopy (Packet, p. 1)
  • Discuss Atomic Mass - It's Relative (Packet, p. 2)
  • If time allows: Counting Atoms (Packet, p. 5)


  • WebAssign: Unit Review
  • Prepare for the Unit 2 Test


Next Time in Class

>> Thursday, October 17 <<

We will continue our discussion of the use of molar mass and Avogadro's number to do mole conversion problems. We will discuss the Chapter 8.5-6 Reading Guide. We will take the Unit 2 Test on Describing Chemical Change.

Periodic Tables

Are you in need of a periodic table?  Try one of the following websites:

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