Starter:

9897 Evidence of Chemical Reactions11/06/15

Practice:Notes over Chemical Evidences

11/06/15 Evidence of Chemical Reactions

  

ApplicationEvidence of Chemical Change ppt activity

Connection:Physical vs. Chemical Changes Practice

Exit:Write 3-4 sentences explaining what you have learned about chemical changes today.  

Identify the parts of a chemical equation

EQ: How can comparing and contrasting help me to understand how matter physically or chemically changes?

November 6,2015

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 an

activity.

1. Starter2. Notes3. Activity4. Ws5. Exit

Table of ContentsDate Lecture/ Activity/ Lab Page10/27 Writing Chemical Formulas 81-8210/28 Ionic Bonding 83-8410/29 ChemicalEquations and the Conservation of Mass 85-8610/30 Balancing Act 87-8811/02 Balancing Chemical Equations Activity 89-9011/03 See Saw Poster 91-9211/4 Law of Conservation of Mass Lab 93-9411/5 Balancing Equations Review 95-9611/6 Physical and Chemical Changes Notes 97-98

Starter: Label the parts of the equation

CoefficientChemical Formula

Element yieldssubscript

Physical vs. Chemical ChangesNotes

Matter undergoes changes all of the time.

There are two types of changes:

chemical

physical &

Physical changes:

Physical changes occur when the appearance of a substance changes…

…but chemical

ly the substance is the same.

The individual molecules

do not change.

Examples of physical

changes are, melting, freezing,

or changing size or shape.

A physical change

also occurs when

substances are…

mixed and something dissolves…like making salt water or Kool-aid.

The water, salt and sugar still keep their original properties and the substances can be separated again.

Chemical Changes

A chemical change occurs

when the atoms making

up matter rearrange..

to form a new substance with new

properties.

This usually occurs during

a chemical reaction.

Evidence of a chemical

change:

Production of a gas.

bubblesfizzing

foamingsmokeodor

color change*not all color changes are

chemical!

A different color appears

*not all color changes are

chemical!

Formation of a

precipitate

cloudiness

foggy

solid at bottom of container

Change in heat or

light energy

Sparksexplosionglowing

temperature

increases or

decreases

These are only

clues…

…a chemical change has not actually taken place unless matter has

changed into a new substance.

Some common

examples of chemical changes

include…

Rusting…

Tarnishing…

Burning…

Cooking…

Digesting…

If you have the chemical

equation, you can tell if a chemical

change has taken place

by…

Looking to see if the

products in the equation

are….

different from the

reactants.

Evidence of Chemical Change

TEKS 6.5D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change.

TEKS 8.5E investigate how evidence of chemical reactions indicate that new substances with different properties are formed.

acid rain on a statue

digesting a hamburger

photosynthesis

a nail rusting

tarnish on pennies

Starter:

9897 Evidence of Chemical Reactions11/06/15

Practice:Notes over Chemical Evidences

11/06/15 Evidence of Chemical Reactions

  

ApplicationEvidence of Chemical Change ppt activity

Connection:Physical vs. Chemical Changes Practice

Exit:Write 3-4 sentences explaining what you have learned about chemical changes today.  

Identify the parts of a chemical equation

EQ: How can comparing and contrasting help me to understand how matter physically or chemically changes?