Mr. Pytleski 100 200 400 300 400 Balancing Chemical Equations Chemical Reactions Physical or...

Mr. Pytleski

100 100

200 200

400 400

Balancing Chemical Equations

Chemical Reactions

Physical or Chemical

Controlling Chemical Reactions

300 300 300

500 500 500 500

Row 1, Col 1

How do you know a chemical equation is balanced?

There is an equal # of atoms on both sides of the arrow

When a chemical equation breaksdown a molecule into

simpler parts, the reaction isknown as ________.

Decomposition

Give me an example of a physicalchange in a substance.

Any change that does not change the substance

Name one way the RATE of a chemical reaction can sped up.

Higher concentration, increase of surface area, increase temperature

WHOLE CLASSBalance the equation below

Sn + Cl2 ------- SnCl2

Sn + Cl2 = SnCl2

How many hydrogen and oxygen molecules are there on the ‘Product’

side of the following equation?

2 H2O2 2 H2O + O2

Smashing or pulling apart a marshmallow is an example of

what kind of reaction?

Physical

In our body there are proteinscalled ____ that help to speed up

reactions within our cells tocarry on life processes.

enzymes

In a chemical reaction, what is theTerm for the statement…’

‘Nothing is created ordestroyed with a chemical

Reaction.’

Law of Conservation of Mass

A __________ system is one where no matter is allowed to

enter or leave. (Example: A sandwich decaying in a sealed

closed

Combustion, electrolysis,oxidation (rusting), and tarnishing

are all examples of what kind of a reaction?

Chemical Changes

A material used to decreasethe rate of a reaction is called

a/an __________.(Also, give an example of one.)

Inhibitor (Food preservatives)

The materials that go into a chemical reaction are

known as the ___.

Reactants

The minimum amount of energyneeded to get a chemical reaction started is known

a the ______ energy.

activation

The study of matter and howmatter changes is called ______.

Chemistry

1 Extra Credit Point for the LUCKY TEAM who received this

question.

1 point Extra Credit

Balance the Equation

H2 + O2 -------> H20

2 H2 + O2 -------> 2 H20

A chemical reaction where energyis absorbed is called an ____

reaction.

endothermic

State TWO pieces of evidence indicating a chemical change.

State of matter change, color change, smell, temperature change…

What can be done to separate water into its reactants again?

(This means the water is changed back into

Hydrogen and oxygen (gases.)

Run electric current through them

Mr. Pytleski 100 200 400 300 400 Balancing Chemical Equations Chemical Reactions Physical or...

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Language Of Chemistry 100 Miscell aneous Stoichio metry Chemical Reactions Properties Of Gases 500 400 300 200 100 200 300 400 500 400 300 200 100 Final

Branches of Science Matter Vocab. Physical or Chemical Changes? $100 $200 $300 $400 $500 $400 $500

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100 200 400 300 400 vocabulary Physical & chemical changes Signs of a chemical change More vocab 300 200 400 200 100 500 100

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