7. Chemical Reactions

Chemical Reactions

How many atoms of each element are found in Na2SO4?

Chemical ReactionsHow many atoms of each element are

found in Na2SO4?Na= 2S = 1O = 4

Chemical Reactions

How many atoms of each element are found in Ba(OH)2?

Chemical Reactions

How many atoms of each element are found in Ba(OH)2?

Ba = 2

O = 2

H = 2

Chemical Reactions

How many atoms of each element are found in (NH4)3PO4

Chemical Reactions

How many atoms of each element are found in (NH4)3PO4

N = 3

H= 12

P = 1

O = 4

Chemical Reactions

In a chemical reaction the substances on the left of the are called ____________ and the substances on the right are called __________ .

Chemical Reactions

In a chemical reaction the substances on the left of the are called reactants and the substances on the right are called products .

Chemical Reactions

In chemical reactions ________ speed up a reaction and _________ slow down a reaction.

Chemical Reactions

In chemical reactions catalysts speed up a reaction and inhibitors slow down a reaction.

Chemical Reactions

In a combustion reaction, oxygen (O2) reacts with another substance to produce _____ and ______.

Chemical Reactions

In a combustion reaction, oxygen (O2) reacts with another substance to produce carbon dioxide (CO2) and water (H2O)

Chemical Reactions

In a combustion reaction, oxygen (O2) reacts with another substance to produce carbon dioxide (CO2) and water (H2O)

Chemical Reactions

Balance the following reaction:

AlBr3 + K KBr + Al

Chemical Reactions

Balance the following reaction:

AlBr3 + 3K 3KBr + Al

Chemical Reactions

What type of reaction is this?

AlBr3 + 3K 3KBr + Al

Chemical Reactions

What type of reaction is this?

Al is displaced and Br binds to potassium: Single displacement

AlBr3 + 3K 3KBr + Al

Chemical Reactions

Balance the following reaction:

CH4 + O2 CO2 + H2O

Chemical Reactions

Balance the following reaction:

CH4 + 2O2 CO2 + 2H2O

Chemical Reactions

What type of reaction is the following reaction?

CH4 + 2O2 CO2 + 2H2O

Chemical Reactions

What type of reaction is the following reaction?

Oxygen gas reacts to produce carbon dioxide and water: combustion.

CH4 + 2O2 CO2 + 2H2O

Chemical Reactions

What type of reaction is the following reaction?

Bi + F2 BiF3

Chemical Reactions

What type of reaction is the following reaction?

Two substances form ONE, more complex substance. synthesis

Bi + F2 BiF3

Chemical Reactions

Balance the following reaction.

Bi + F2 BiF3

Chemical Reactions

Balance the following reaction.

2Bi + 3F2 2BiF3

Chemical Reactions

Balance the following reaction.

Al2O3 Al + O2

Chemical Reactions

Balance the following reaction.

2Al2O3 4Al + 3O2

Chemical Reactions

What type of reaction is this?

2Al2O3 4Al + 3O2

Chemical Reactions

What type of reaction is this?

A compound breaks down into two simpler compounds; decomposition

2Al2O3 4Al + 3O2

Chemical Reactions

What type of reaction is this?

A compound breaks down into two simpler compounds; decomposition

2Al2O3 4Al + 3O2

Chemical Reactions

What type of reaction is this?

FeO + PdF2 FeF2 + PdO

Chemical ReactionsWhat type of reaction is this?

Ions switch places. Double displacement

FeO + PdF2 FeF2 + PdO

Chemical Reactions

Balance the reaction?

FeO + PdF2 FeF2 + PdO

Chemical Reactions

Balance the reaction?

FeO + PdF2 FeF2 + PdO

It IS balanced

Chemical Reactions

When there is a net release of energy during a chemical reaction (usually in the form of heat) it is __________, but if energy is absorbed and the temperature decreases it is ________.

Chemical Reactions

When there is a net release of energy during a chemical reaction (usually in the form of heat) it is exothermic , but if energy is absorbed and the temperature decreases it is endothermic.

Chemical Reactions

_____ ______ is the minimum amount of energy needed to start a chemical reaction.

Chemical Reactions

Activation energy is the minimum amount of energy needed to start a chemical reaction.

Chemical Reactions

Which of the following is NOT true of a mole?

a.contains 6.02 x 1023 particles of a substance

b.atomic number of an element is equal to its molar mass.

c.is represented by Avogadro’s number

d.mole ratios cannot be determined in a chemical reaction

Chemical Reactions

Which of the following is NOT true of a mole?

a.contains 6.02 x 1023 particles of a substance

b.atomic number of an element is equal to its molar mass.

c.is represented by Avogadro’s number

d.mole ratios cannot be determined in a chemical reaction

Chemical Reactions

What is the molar mass of one mole of Argon?

Chemical Reactions

What is the molar mass of one mole of Argon?

Find argon (Ar) on the periodic table. The atomic mass equals one molar mass = 40 g/mol

Chemical Reactions

What is the mass of 2 moles of carbon?

Chemical Reactions

What is the mass of 2 moles of carbon?

Find carbon (C) on the periodic table. The atomic mass equals one molar mass = 12 g/mol

2 mol C x 12 g C / 1 mol C = 24 g C

Chemical Reactions

What is the mass of 1 mole of sodium chloride (NaCl)?

Chemical Reactions

What is the mass of 1 mole of sodium chloride (NaCl)?Element Atoms of

elementMolar mass Total mass for element

Na 1 X 23 = 23

Cl 1 X 35 = 35

Sum of masses 58 g/mol NaCl

Chemical Reactions

What is the mass of 1 mole of sodium chloride (CaCO3)?

Chemical Reactions

What is the mass of 1 mole of sodium chloride (CaCO3)?Element Atoms of

elementMolar mass Total mass for element

Ca 1 X 40 = 40

C 1 X 12 = 12

O 3 x 16 = 48

Sum of masses 100 g/mol CaCO3