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Ch 7.1 Describing Reactions

Ch 7.1 Describing Reactions

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Author: deirdre carney
Description:
  • Interpret chemical equations in terms of reactants, products, and conservation of mass
  • Balance chemical equations by manipulating coefficients
  • Convert between moles and mass of a substance using molar mass
  • Calculate amounts of reactants or products by using molar mass, mole ratios, and balance chemical equations

Nevada Science Standards

P.12.A.7 Students know that, in chemical reactions, elements combine in predictable ratios, and the numbers of atoms of each element do not change. I/S 

Next Generation Science Standards

HS-PS1-h Use Mathematical expressions to support the explanation that atoms, therefore mass, are conserved during a chemical reaction.

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Tutorial

Introduction to Chemical Reactions

What is a chemical reaction?

Chemical Properties

How can you recognize a Chemical Reaction? Take a look at these slides to understand the chemical properties of substances.

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Source: Prentice Hall Physical Science - Concepts in Action Chapter 2.3

Chapter 7.1 Part I pg 192-195

Read Part I of Chapter 7.1. Outline the reading in your Science Notebook & include major points and diagrams/tables.
You should focus on the following essential questions:
- What is a chemical equation?
- What is the Conservation of Mass?
- Why must chemical equations be balanced?
- How do you balance chemical equations

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Source: prentice Hall Physical Science - Concepts in Action

Video Clip: How to Balance Equations

Watch Mr. Anderson describe how to balance equations. Add some examples to your science notebook.

Balancing Chemical Equations

Practice Balancing Chemical Equations.

Go to: http://funbasedlearning.com/chemistry/chemBalancer/

 

Complete the following handout to record your equations. Turn in completed handout.

More Practice Balancing Equations

Online Practice test for Balancing Equations.

http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm

 

Chapter 7.1 Part II pg 195-198

Read Part II of Chapter 7.1. Outline the reading in your Science Notebook & include major points and diagrams/tables.
You should focus on the following essential questions:
- What is a mole in chemistry?
- Why do chemists use the mole?
- How can you calculate the mass of a reactant or product in a chemical reaction?

Full Screen

Source: prentice Hall Physical Science - Concepts in Action

Video: The Mole

Watch this video to get an understanding of the mole and how it is used in chemistry calculations.

Video: Molar Mass

Watch this video for information on how to calculate the molar mass of a compound.

Video: Molar Mass Conversion

These example problems demonstrate how to determine the molar mass of a substance and then use it to convert between moles and mass.

Video: Using Mole Ratios

How to use chemical formulas to determine the mole ratio of elements in a compound and then how to use that ratio in combination with Avogadro's number and molar mass.

Chapter 7.1 Text Questions

After reading Chapter 7.1 and watching the videos, answer the questions on page 198 #1-7.

Use complete sentences and proper vocabulary/scientific terms.

Source: prentice Hall Physical Science - Concepts in Action