Chem Chapter 10 Review

Chemical Reactions

100

What is a chemical reaction?

Any change that causes a substance to change its chemical identity. 

200

When chemical reactions occur, there will be a change in __________.

Energy 

300

Name 2 evidences of chemical reactions

Color change/gas production

400

What is a solid that settles out of a solution as the result of physical or chemical changes?

Precipitate 

500

What are reactants and products?

Reactants :Substances that take part in a reaction and appear on the left side.

Products: Substances are produced by a reacton and appear on the right side

Balancing equations

100

What is the law of conservation of matter?

Matter cannot be created or destroyed

200

What is a coefficient?

numbers that tell how man atoms, ions, molecules are present

300

 Al₂(SO₃ )₃

_{How many atoms are present for each element?}

Al=2

S=3

O=9

400

(NH₄)₃PO₄

How many atoms are present for each element?

N=3

H=12

P=1

O=4

500

As₃(S₁₂O₅)₅ 

How many atoms are present for each element?

As=3

S=60

O=25

Balancing equations continued

100

__C + ___ S₈ -->  ___ CS₂

_4 C + _1 S₈ -->  _4 CS₂ 

200

 Rb + S₈ --->  Rb₂S

16 Rb + _1 S₈ --> _8 Rb₂S

300

 C + SO₂ --> CS₂ +  CO

_5 C + _2 SO₂ --> _1__ CS₂ + _4CO

400

 NH₃ + O₂ -->  N₂ +  H₂O

4__ NH₃ + _3__ O₂ --> _2__ N₂ + _6__ H₂O  

500

 FeS₂ + O₂ --> Fe₂O₃ + SO₂

_4__ FeS₂ + _11__ O₂ -->  _2__ Fe2O₃ + _8__ SO₂

Types of reactions

100

What are the 5 types of reactions?

Synthesis, Decomp, combustion, single replacement, double replacement

200

What type of reaction combines two or more substances into as single product?

Synthesis reaction

300

What type of reaction results in CO₂ and water?

Combustion of hydrocarbons

400

What type of reaction is 

_10__ Rb + _2__ RbNO₃ --> _6__ Rb₂O + _1__ N₂

Single replacement

500

What type of reaction is: 

2__ C₂H₆ + _7__ O₂  ---> 4__ CO₂ + _6__ H₂O

Combustion