Balancing and ID'ing Reactions

The Types of Reactions

1. Synthesis

2. Decomposition

3. Single Replacement

4. Double Replacement

5. Combustion

Types of Reactions

1. A +B → AB Synthesis

2. AB + C → AC + B Single Replacement

3. CxHy + O2 → CO2 + H2O Combustion

4. AB → A +B Decomposition

5. AB + CD→AD + BC

Identifying Reactions

4 Na + O2→ 2 Na2O

What kind of reaction is this?

How can you tell?

Identifying Reactions

HCl + NaOH →NaCl + H2O

What kind of reaction is?

How can you tell?

Identifying Reactions

KNO3 →KNO2 + O2

Balance First

What kind of reaction is this?

How can you tell?

K

1

K

1

N

1

N

1

O

3

O

4

Balancing Combustion Reaction

C2H4 + O2→CO2 + H2O

Multiply coefficients by subscripts, but add to other compounds

C

2

C

1

H

4

H

2

O

2

O

3

Balancing Single Replacement Reactions

K + B2O3 → K2O + B

K

1

K

2

B

2

B

1

O

3

O

1