Types Of Reactions

Question 0

For a synthesis reaction, what is the rule about Non- metal oxides?

Answer 0

When reacted with water they become ACIDS.

H2O + CO2 —-> H2CO3
H2O + SO2 —-> H2SO3

Question 1

What are the 5 types of reactions?

Answer 1

Synthesis
Decomposition
Combustion
Single displacement
Double displacement

Question 2

For a synthesis reaction, what is the rule about Metal Oxides?

Answer 2

When reacted with water, Metal Oxides become BASES.

Na2O + H2O —-> NaOH
ZnO + H2O —-> Zn (OH)2

Question 3

What is a synthesis reaction?

Answer 3

The reactants can be atoms, molecules, or both.

The product MUST be a MOLECULE

S + O2 —> SO2

Question 4

What is a decomposition reaction?

Answer 4

Reactants are ALWAYS molecules

Products can be atoms, molecules, or both.

3N2H2 —-> 2N2 + 2NH3

Question 5

What are the rules for decomposition reactions??

Answer 5

1) Binary compounds decomposing into elements.
2) Metal Nitrate decomposes into Metal Nitrate and O2.
3) Metal carbonate decomposes into Metal Oxide and CO2.
4) Metal hydroxide decomposes into metal Oxide and H2O.

Question 6

What is a combustion reaction??

Answer 6

Reaction that produces heat and light using oxygen.

Question 7

What is Hydrocarbon Combustion?

Answer 7

2 types:
Complete combustion
CX + HY + O2 —-> CO2 + H2O

Incomplete combustion:
CXHY+O2 —-> C+CO+CO2+H2O

Question 8

What is complete combustion?

Answer 8

CX + HY + O2 —-> CO2 + H2O

Produces a blue flame.
HIGH heat.
LOW light.
Leaves behind no ash.

Question 9

What is Incomplete Combustion??

Answer 9

CXHY+O2 —-> C+CO+CO2+H2O

Produces yellow flame.
LOW heat.
HIGH light.
Leave behind ash.

Question 10

What is Non-Hydrocarbon Combustion??

Answer 10

• Does NOT involve hydrocarbons.
• Typically involves gases like H2 or S.
• Still requires oxygen.
• Considered both combustion and synthesis.

2Mg + O2 —-> MgO + heat/ light

Question 11

What is Cellular Respiration??

Answer 11

• Involves carbohydrates.
  (CX HY OZ)
• Slow and continuous.
• Supports life.

Question 12

What is a single displacement reaction??

Answer 12

• Reaction where one element displaces the other.
• Use Activity Series and Halogens Series. Used ONLY in single displacement reactions.

6Na + Fe + Cl2 —-> 3Na2O + 2Fe
Fe + Na2O —-> NR

Question 13

What is a double displacement reaction??

Answer 13

AX + BY —-> AY + BX

• Use SOLUBILITY table.
• If BOTH products are aqueous there is NO reaction.
• If at least one product is “low solubility”, there IS a reaction.

BaCl2 (aq) + NaSO4 (aq) —-> BaSO4(s) + NaCl (aq)

Question 14

What are the 3 types of double displacement reactions??

Answer 14

Solid formation.
Gas formation.
Water formation (neutralization).

Question 15

In double displacement reactions, what is a solid formation??

Answer 15

One of the products is a SOLID precipitate.

Use SOLUBILITY table.

Question 16

In a double displacement reaction, what is a Gas formation??

Answer 16

When one if the products is H2CO3(aq) or NH4OH(aq), a gas is produced through Decomposition.

H2SO4 + NaCO3 –> Na2SO4(aq) + H2CO3 –> Na2SO4(aq) + H2O(l) + CO2(g)

NH4Cl + NaOH –> NaCl + NH4OH –> NaCl + H2O + NH3(g)

Question 17

In a double displacement reaction, what is a Water formation??

Answer 17

Also known as a neutralization reaction.

Occurs between and ACID and a BASE.

HCl + NaOH –> NaCl + H2O(l)