outline: 1) short lesson on 4 chemical reaction types€¦ · science 24 chapter 3 notes.notebook 1...

Science 24 Chapter 3 Notes.notebook

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March 03, 2015

Science 24: Day 14

Outline:

1) Short lesson on 4 chemical reaction types

2) Start chemical reactions project


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March 03, 2015

3.2 Types of Reactions1) Simple Composition Reactions

When two or more simple elements combine to form a compound

Exothermic

The product is ALWAYS a compound, in a simple composition reaction

Element 1 + Element 2 > Compound A + B > AB


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March 03, 2015

2) Simple Decomposition Reactions These are reactions that breaks a compound into its component elements

endothermic

The products are ALWAYS elements, in a simple decomposition reaction.

Compound > Element 1 + Element 2 CD > C + D


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March 03, 2015

3) Combustion Reactions Combustion reactions ALWAYS occur in the presence of oxygen

Exothermic

Oxygen and fuel are ALWAYS the reactants; carbon dioxide, water vapour, and energy are ALWAYS the products

fuel + oxygen > carbon dioxide + water vapour + energy


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March 03, 2015

4) Neutralization Reactions Neutralization reactions ALWAYS occur in presence of an acid and base

Acid and base are ALWAYS the reactants; a salt and water are ALWAYS the products

acid + base > salt + water


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March 03, 2015


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March 03, 2015

Science 24: Day 18

Outline:

1) Review chemical names and formulas

2) Law of Conservation of Mass and

Balancing equations


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March 03, 2015

3.4 Chemical Equations

Law of Conservation of Mass states that matter can neither be created or destroyed. In other words, when a reaction occurs the reactants must equal the products.

founder: Antoine Lavoisier

Application Examples:Sodium + chlorine > sodium chloride

If you have 0.7 grams of chlorine and 3.3 grams of sodium, how many grams of sodium chloride will you have?

http://www.youtube.com/watch?v=mcngabbNXk

http://www.youtube.com/watch?v=mcnga-bbnxk


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March 03, 2015

Barium + oxygen > barium oxide

If there is 0.5 grams of barium and 1.0 grams of barium oxide, how many grams of oxygen should there be?


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March 03, 2015

Staying Balanced

Scientists must use balanced equations. This means that all atoms must balance out. It is very similar to the law of conservation of mass.

How many atoms of hydrogen do you have on the reactant side?

How many hydrogen atoms do you have on the product side?

Are they the same?


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March 03, 2015


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March 03, 2015


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March 03, 2015

Science 24: Day 18

Outline:

1) Goal making

2) Balancing equations lesson and practice

3) Chapter 3 Review Circle


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March 03, 2015

Work with a partner: Which of the following are balanced?

1) Cl2 + 2 KI > 2 KCl + I2

2) 3 Li + 2 H2O > 2 LiOH + H2

3) Zn + H2SO4 > ZnSO4 +H2

4) 2 Mg + O2 > 2 MgO

5) 2 HgO > Hg + O2


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March 03, 2015

Balancing Equations:

Examples:

Mg + O2 > MgO

HgO > Hg + O2


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March 03, 2015

Science 24: March 3rd

Outline:1) Making popcorn!2) Balancing equations practice and assignment3) Chapter 3 Review


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March 03, 2015


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March 03, 2015

Practice: Balance the following equations

_____ C10H16 + _____ Cl2 > _____ C + _____ HCl

____ Zn + _____ HCl > _____ ZnCl2 + _____ H2


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March 03, 2015

outline: 1) short lesson on 4 chemical reaction types€¦ · science 24 chapter 3 notes.notebook 1...

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