Science 10: Monday, Oct. 6 Outline: 1. Intro to chapter 2 ...mrsbarendregt.weebly.com/uploads/1/3/2/1/13211184/... · Science 10 Chapter 3 block 2.notebook March 12, 2015 ... 1. Intro

Science 10 Chapter 3 block 2.notebook March 12, 2015

Science 10: Monday, Oct. 6Outline:

1. Intro to chapter 2: Amazing chemical reactions video

2. Chemical reactions review

3. Lesson on chemical reactions



https://www.youtube.com/watch?v=FofPjj7v414

Which reaction was your favorite?

What kinds of things did you observe?

What did all the chemical reactions have in common?

https://www.youtube.com/watch?v=fofpjj7v414


3.1 Important Examples of Chemical Reactions

Reactants are the substances that react to produce new substances, so this is what you start with.

Products are substances formed from the reaction, so this is what you end with.

The properties of the reactants and products are completely different.

We use chemical reactions in our daily lives.

Examples?


Energy Changes

Exothermic refers to a reaction in which there is a release of energy including: heat, light, electricity

energy is written on the product side of reaction

Example: burning

Endothermic refers to a reaction in which there is absorption of energy including heat, light, electricity

energy is written on the reactant side of reaction

Example: cold pack


Biochemical Reactions

1) Photosynthesis is a process in which plants are using sunlight in order to create food. It is an endothermic reaction.

2) Cellular respiration is a process in which food energy from is converted into an energy source that can be used. It is an exothermic reaction.

What do you notice about these two reactions when compared to one another?


Characteristics of a Chemical Reaction

1) Change of properties2) Change in energy

a) Exothermicb) Endothermic

3) Formation of gas (bubbles) or solid (precipitate)4) Law of Conservation of Mass which refers to the fact

that mass is never lost.

https://www.youtube.com/watch?v=J5hM1DxaPLw

https://www.youtube.com/watch?v=j5hm1dxaplw


Science 10: March 10thOutline:

1. Review game2. Writing chemical equations


3.2 Writing Chemical Equations

Chemical equations use chemical symbols and formulas in order to represent an equation. The general equation is as follows:

Reactant > Product

If you have multiple reactants and products you separate each reactant and each product with a "plus" sign.

reactant 1 + reactant 2 > product 1 + product 2

You read it as follows: reactant 1 reacts with reactant 2 to produce product 1 and product 2.


Write a sentence for the following word equation:

oxygen + glucose > carbon dioxide + water + energy

Write the word equation from the following sentence:

carbonic acid and calcium carbonate produce calcium hydrogen carbonate


Practice: Write the word equation for photosynthesis

Carbon dioxide, water, and energy react to produce glucose and oxygen


Make a MindMap!

Use the following words to create a mind map showing the relationship among the terms. Be sure to include a short description of how terms are related.

Chemical reaction

Endothermic

Exothermic

Formula Equation

Law of Conservation of Mass

Photosynthesis

Cellular Respiration

Reactants

Products

Word equation



Science 10: March 11thOutline:

1. Lesson on balancing equations2. Balancing equations with candy!3. Balancing equations worksheet


Formula Equations

Formula equations use the chemical formulas of reactants and products to represent a chemical equation.

Write the formula equation for the following, make sure to include states.

iron(II) chloride + oxygen > iron(II) oxide + chlorine

iron(III) nitrate + sodium phosphate > sodium nitrate + iron(III) phosphate



Write a Guide to Balancing Chemical Reactions

1) Use an index card

2) On one side, write out steps to balancing chemical reactions IN YOUR OWN WORDS (5 marks)

3) On other side, write an example of balancing an equation. Show all the steps (5 marks)

Total: 10 marks


Science 10: March 12th

Outline:1. Review balancing equations2. Formation, decomposition, and combustion reactions lesson, demos, and practice

You will need:

Dry erase marker Eraser (2 per table) Chapter 3 notes Pen or pencil

Get these, then CLEAR OFF YOUR DESKS!


2. ______ Fe2O3 + ______ CO = ______ Fe + ______ CO2

1. ____ KClO3 → ____ KCl + ____ O2


Rules for Writing Formation and Decomposition Balanced Equations:

When writing balanced formula equations from word equations, always ensure that:

a) All reactants and products are written in their proper form (ie all elements are written as they appear in nature eg. Cl2, P4, Br2 etc. and all compounds are written according to the rules outlined in chapter 2)

b) All states are included. Assume all formation reactions are NOT done in water therefore;

i.) all elements are written in their natural state as outlined by the periodic table.ii) all ionic compound are (solids)

iii) molecular substance can be (s), (l), (g). or (?) depending on the information given.

c) All reactions are balanced with the same number of each atom exists on each side of the equation.


Formation ReactionsThis occurs when two elements combine to form a compound. They are also known synthesis or simple composition.

General Equation:ELEMENT + ELEMENT > COMPOUND

A + B > AB

http://www.slideshare.net/benwildeboer/typesofchemicalreactions1449480

https://www.youtube.com/watch?v=hQW5a5D5aE

http://www.slideshare.net/benwildeboer/types-of-chemical-reactions-1449480

https://www.youtube.com/watch?v=-hqw5a5d5ae


Examples:

1)Aluminum burns in bromine producing aluminum bromide.

2) N2 + H2 > NH3

3) copper + bromine >

4) aluminum + oxygen >

5) ___ K(s) + ___ S8(s) >

6) hydrogen + oxygen >


Decomposition ReactionsThis occurs when a compound is broken down into its elements.

General Equation:

Complex Substance > Simpler Substances

Generally used in Science 10: Compound > Element + Element

AB > A + B

http://www.slideshare.net/benwildeboer/typesofchemicalreactions1449480

http://www.slideshare.net/benwildeboer/types-of-chemical-reactions-1449480


Examples:

1. iron(III) chloride > iron + chlorine

2. ____Ag3P(s) >

3. iron(III)nitride >

4. _______ > strontium + iodine

5. calcium sulfide >

6. __ Ga2O3(s) >

7. __ AgNO3(s) >

Documents

Science 10: Monday, Oct. 6 Outline: 1. Intro to chapter 2 ...mrsbarendregt.weebly.com/uploads/1/3/2/1/13211184/... · Science 10 Chapter 3 block 2.notebook March 12, 2015 ... 1. Intro