Chemical Reaction in Daily Life

Presentation

•

Science

•

10th Grade

•

Hard

Joseph Anderson

FREE Resource

5 Slides • 20 Questions

Chemical Reactions Make Up Day

KCP Chemistry

Instructions...

Completion of this lesson will serve as a make up grade for selected practice grades. The ENTIRE lesson must completed and the score recieved will go in the gradebook as the replacement score.

Be sure to submit selected replacement assignments

Multiple Choice

The Law of Conservation of Mass states

that matter exists in all states and reacts the same

that matter can only be changed into new substances by introducing a catalyst

that matter exists in the same state throughout any chemical change

that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Multiple Choice

What is the BEST definition of a chemical reaction?

A change in matter that produces one or more NEW substances

When two things combine and EXPLODE.

Multiple Choice

What is the term for the → sign in a reaction?

makes

produces

yields

all are correct

Multiple Choice

If an element is diatomic it should have a subscript of___

1, always

2, only when it is an element

it shouldn't have a subscript, it should have a coefficent

2, when bonded in a compound

Multiple Choice

What are the reactants in the chemical equation pictured?

CH₄ and CO₂

CH₄ and O₂

CO₂ and H₂O

O₂ and H₂O

Multiple Choice

___________________ are the elements/compounds formed in a chemical reaction (on the right)

Polymers

Bonds

Reactants

Products

Definition of a Chemical Reaction

The process of breaking chemical bonds in one or more substances to reform bonds and create new substances

Multiple Choice

Which one shows that a chemical reaction has occurred?

dissolving

melting

formation of a gas

bending

Multiple Select

Which of the following are evidence of a chemical reaction?

Formation of a solid

Color Change

Formation of a gas

Release of Energy/Heat

Steps to Balancing an Equation

1. Determine the number of atoms for each element.

2. Pick an element that is not equal on both sides of the equation.

3. Add a coefficient in front of the formula with that element and adjust your counts.

4. Continue adding coefficients to get the same number of atoms of each element on both sides

Multiple Choice

Is this balanced?...
Al + O₂ --> 2Al₂O₃

Yes!

NO!

Multiple Choice

Is this balanced?...
Fe + S --> FeS

YES!

NO!

Multiple Choice

The red numbers in the image below represent ________

subscripts

coefficients

I don't know, and don't want to try

None of the answers are correct

Multiple Choice

The number of atoms you begin with in a chemical reaction ...

must be the same as the number of atoms you end with

must be an even number

can be different to the number you finish with

changes depending on how much energy is formed

Multiple Choice

Choose the balanced chemical equation for the formation of iron oxide.

2Fe + O₂→ 2FeO₂

Fe + O₂→ FeO₂

4Fe + 3O₂→ 2Fe₂O₃

4Fe + O₂→ 2FeO₂

Multiple Choice

Balancing the following:

____ Al + ____ HCl → ____ AlCl₃ + ____ H₂

1,3,1,2

2,3,2,3

2,6,2,3

3,2,6,2

Multiple Choice

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

1,3,3,1

1,3,2,1

2,3,3,1

1,1,3,1

Synthesis Reactions

Also known as “combination” reactions

Definition: Two or more elements combine to make a new compound.

Multiple Choice

Without balancing the final equation, predict the products for the synthesis reaction: $Li\ +\ Cl_2\ \rightarrow$ ?

$LiCl_2$

$LiCl_{ }$

$Li_2Cl_2$

$Li_2Cl_{ }$

Multiple Choice

Without balancing the final equation, predict the products for $Al\ +\ Cl_{2\ }\rightarrow\ ?$

$Al_3Cl$

$AlCl$

$AlCl_3$

$Al_3Cl_2$

Multiple Choice

A synthesis reaction can be represented as ________________________.

AB + CD → AC + BD

AB → A + B

A + B → AB

A + BC → B + AC

Multiple Choice

This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O₂→ 2MgO

decomposition reaction

synthesis reaction

single displacement reaction

combustion reaction

Multiple Choice

Which of the following is an example of synthesis?

Na + Br₂--> NaBr

KClO₃--> KCl + O₂

HgO + Cl₂-->HgCl + O₂

Cl₂ + NaBr --> NaCl + Br₂

Chemical Reactions Make Up Day

KCP Chemistry

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