Unit 10 - Compounds and Chemical Reactions

In an earlier unit we were introduced to the concept of physical change in which substances change form but retain all their physical properties. In contrast, a chemical is a change in matter that produces new substances with different sets of physical properties. On the atomic level, a chemical change is the result of making and breaking of bonds between atoms. In this unit we will take a closer look at chemical changes, which we also refer to as chemical reactions, and see how such reactions obey one of the fundamental laws of the universe - The Law of Conservation of Matter.

SPS2b: Predict formulas for stable binary ionic compounds based on balance of charges.

SPS2c: Use IUPAC nomenclature for transition between chemical names and formulas of
binary ionic compounds and binary covalent compounds.

SPS2d: Demonstrate the Law of conservation of Mass in chemical reactions.

SPS2e: Apply the Law of Conservation of Mass by balancing the following types of chemical equations:

• synthesis
• decomposition
• single replacement
• double replacement

Specific Assignments

Assignment 1: Mini-lecture: Compounds, Chemical Reactions, and the Law of Conservation of Matter. The lecture will review chemical bonding between atoms, introduce the anatomy of a chemical reaction, and show how we can use the Law of Conservation of Matter to balance chemical reactions. Take notes and fill-in the definitions of the vocabulary works on the Chemical Reactions worksheet as you go. Afterwards, use what you learned to complete worksheet on Balancing Chemical Equations (handout).

(Note): If, you missed the above lecture, or you just want to review what you learned about the chemical reactions and the Law of Conservation of Matter, complete the following lesson in NovaNet listed under:
Intoduction to Chemistry
Atoms and their Properties Pg. 1
Lesson ): Conservation of Atoms

Assignment 2: Mini-lecture: How to predict and name compounds. Take notes. Afterwards, use what you learned to complete worksheet on Predicting and Naming Compounds (handout).

(optional assignment). Get a list of the names polyatomic ions from your instructor (handout). Fill in the worksheet. Next, work in groups of 3-4 to make a set of flash cards, placing the name of each polyatomic ion on one side and its chemical formula on the other side. Use the flashcards to help you study for the unit quiz.

(Note): If you missed the above mini-lecture and activity, or you would just like to review what you learned about naming ionic compounds, complete the following lesson in NovaNet:
Go to: Introduction to Chemistry
04 Properties of Atoms pg. 3

• Naming Ions and Salts

Assignment 3: Mini-lecture: The Rate of Chemical Reactions. Take notes. Observe demonstration of the effect of temperature on the rate of a chemical reaction.

Assignment 4: Mini-lecture: Four kinds of Chemical Reactions. Take notes. Participate in class discussion. Then, as a class, review what you have learned about chemical reactions by watching a short video on chemical reactions. Continue to complete the vocabulary worksheet on Chemical Reactions as you go.

Assignment 5: Mini-lecture: Energy of Activation, Catalysts, and Exothermic vs. Endothermic Reactions. Take notes, especially copy diagrams written on the board.

Unit test (paper): Compounds and Chemical Reactions (includes applying what you learned about predicting and naming compounds, types of chemical reactions, balancing chemical reactions, the effects of catalysts and inhibitors, and being able to recognize an exothermic reaction from an endothermic reaction).