9/26/1178 Balancing Equations

10/28/2013

77 Balancing Equations

10/28/2013

Starter:

Label the parts of the equation:

Practice/Application/Connection/ Paste Notes/Quiz here when graded:

Exit:1. In the following equation,

the elements are rearranged to form new products. What should be placed in the box to the right?

C+ O2

October 25, 2013

AGENDA8.5 F.

I will be able to recognize whether a chemical equation containing

coefficients is balanced or not and how that relates to the law of

conservation of mass by reading, and writing

while completing notes and activity.

1 Starter2. Activity

Label the parts of the equation

CoefficientChemical Formula

Element yieldssubscript

Date Lecture/ Activity/ Lab Page9/25 Metal, Nonmetals, and Metalloids 41-429/26 Where’s Al? 43-449/27 Element Wanted Poster 45-469/30 Bohr Model Challenge 47-4810/1 Periodic Table Notes/Puzzles 49-5010/2 Periodic Table Chart 51-5210/3 Test Review 53-5410/8 Test Corrections 55-5610/9 Molecules, Compounds, and Elements 57-5810/10 Build a Molecule Activity 59-6010/15 Counting Atoms 61-6210/16 Counting Atoms with Coefficients 63-6410/17 Writing Chemical Formulas 65-66 10/18 Physical and Chemical Changes/Properties Notes 67-6810/21 Chemical Equations and the Conservation of Mass 69-7010/22 Balancing Equations 71-7210/24 Beady Balance 73-7410/25 See Saw Poster 75-76Oct 28 Signs of a Chemical change 77-78

Table of Contents

Signs of a Chemical Change

Gas Formatio

n

Sound/ light

Energy Change

Precipitate

Color Change

PRECIPITATEFormation of a Solid

• A precipitate is a solid formed in a chemical reaction that is different from either of the reactants.

ENERGYTemperature Change

When two substances are combined, any increase or decrease in temperature is a sign of a chemical change. The temperature may change very suddenly or occur over a long period of time.

If the temperature rises and gives off heat, the reaction is said to be exothermic.

A drop in temperature indicates that the reaction is endothermic.

COLOR CHANGE

• A reaction has occurred if two solutions are mixed and there is a color change that is not simply the result of a dilution of one of the reactant solutions.

SOUND/ LIGHTWhen a substance is altered, light and sound indicate quick changes in temperature. A fireworks display is a good example of the presence of light and sound during a chemical reaction.

.

BUBBLESGas Formation

• If the reaction between two liquids or a solid and a liquid gives off gases, it is likely that a chemical change has occurred. Small bubbles that form inside the liquid underneath the surface are enough to indicate a chemical reaction is taking place.

Remember IT!

Please Excuse Coughs Sneezes and Burps

P- Precipitate- Solid formation

E- Energy Change-Temperature

C- Color Change

S- Sound/ Light

B- Bubbles- Gas Formation

Spooky Video Quiz

Describe how you know that a chemical reaction is happening.

1. Dragon Breath

2. Genie in a bottle

3Pumpkin Brains

What clues helped you determine your answer?

4. Instant Worms

5. Self Carving Pumpkin

6. Liquid Light

9/26/1178 Balancing Equations

10/28/2013

77 Balancing Equations

10/28/2013

Starter:

Label the parts of the equation:

Practice/Application/Connection/ Paste Notes/Quiz here when graded:

Exit:1. In the following equation, the

elements are rearranged to form new products. What should be placed in the box to the right?

C+ O2