Reaction Types-Yellow Sheet Reversed

Question 1

Double Displacement

S + S = insoluble S + soluble S

Answer 1

AgNO₃ (aq) + NaCl (aq) —> AgCl (s) + NaNO₃ (aq)

Question 2

Synthesis

Combo of elements.

Answer 2

2Na (s) + Cl₂ (g) —> 2NaCl (s)

Question 3

Combustion

Answer 3

2C₄H₁₀ + 13O₂ —> 8CO₂ + 10H₂O

Question 4

Combustion

Answer 4

CH₄ + 2O₂ —> CO₂ +H₂O

Question 5

Single Displacement

More active halogens will displace less active halogens.

Answer 5

Br₂ (g) + 2KI (aq) —> 2KBr (aq) + I₂ (g)

Question 6

Double Displacement

S + S = insoluble S + soluble S

Answer 6

Ca(C₂H₃O₂)₂ (aq) + (NH₄)₂CO₃ —> CaCO₃ (s) + 2NH₄C₂H₃O₂ (aq)

Question 7

Decomposition

Some metallic carbonates when heated will decompose to metallic oxide and carbon dioxide.

Answer 7

CaCO₃ (s) —> CaO (s) + CO₂ (g)

Question 8

Decomposition

Metallic chlorates when heated will decompose to metallic chlorides and oxygen.

Answer 8

2KClO₃ (s) —> 2KCl (s) + 3O₂ (g)

Question 9

Decomposition

Some metallic oxides decompose when heated.

Answer 9

2HgO (s) —> 2Hg (l) + O₂ (g)

Question 10

Double Displacement

S + A = 2^nd S + 2^nd A

Answer 10

2KNO₃ (aq) + H₂SO₄ (aq) —> K₂SO₄ (aq) + 2HNO₃

Question 11

Decomposition

Bases when heated will decompose to water and basic anhydride.

Answer 11

2Fe(OH)₃ (s) —> Fe₂O₃ (s) + 3H₂O (g)

Question 12

Double Displacement

S + S = insoluble S + soluble S

Answer 12

Na₂SO₄ (aq) + Ba(NO₃)₂ (aq) —> BaSO₄ (s) + 2NaNO₃ (aq)

Question 13

Decomposition

Some metallic oxides decompose when heated.

Answer 13

2Ag₂O (s) —> 4Ag (s) + O₂ (g)

Question 14

Decomposition

Acids when heated will decompose to water and acid anhydride.

Answer 14

H₂CO₃ (aq) —> CO₂ (g) + H₂O (l)

Question 15

Decomposition

Compounds that are decomposed into elements by electricity.

Answer 15

MgCl₂ (l) —> Mg (l) + Cl₂ (g)

Question 16

Decomposition

Compounds that are decomposed into elements by electricity.

Answer 16

2H₂O (l) —> 2H₂ (g) + O₂ (g)

Question 17

Double Displacement

S + A = 2^nd S + 2^nd A

Answer 17

FeS (s) + 2HCl (aq) —> FeCl₂ (aq) + H₂S (g)

Question 18

Synthesis

Basic anhydride with water will form a base.

Answer 18

BaO (s) + H₂O (l) —> Ba(OH)₂ (aq)

Question 19

Double Displacement

S + B = 2^nd S + 2^nd B

Answer 19

NH₄Cl (aq) + NaOH (aq) —> NaCl (aq) + NH₄OH

Question 20

Single Displacement

A more active metal will replace a less active metal.

Answer 20

Pb (s) + 2AgC₂H₃O₂ (aq) —> Pb(C₂H₃O₂)₂ (aq) + 2Ag (s)

Question 21

Synthesis

Combo of elements.

Answer 21

Fe (s) + S (l) —> FeS (s)

Question 22

Single Displacement

Active metals (Na, Ca, K) reacts with water will give a metallic hydroxide and hydrogen gas.

Answer 22

2Na (s) + 2H₂O (l) —> 2NaOH (aq) + H₂ (g)

Question 23

Decomposition

Metallic chlorates when heated will decompose to metallic chlorides and oxygen.

Answer 23

Ni(ClO₃)₂ (s) —> NiCl₂ + 3O₂ (g)

Question 24

Single Displacement

Active metal (Zn, Fe, Al) displaces hydrogen in acids to give a salt and hydrogen gas.

Answer 24

Fe (s) + H₂SO₄ (aq) —> FeSO₄ (aq) + H₂ (g)

Question 25

Single Displacement

A more active metal will replace a less active metal.

Answer 25

Fe (s) + Cu(NO₃)₂ (aq) —> Fe(NO₃)₂ (aq) + Cu (s)

Question 26

Synthesis

Acid anhydride with water will give an acid.

Answer 26

SO₂ (g) + H₂O (l)—> H₂SO₃ (aq)

Question 27

Double Displacement

A + B = S + H₂O

Answer 27

Ca(OH)₂ (aq) + 2HNO₃ (aq) —> Ca(NO₃)₂ (aq) + 2H₂O (l)

Question 28

Double Displacement

S + S = insoluble S + soluble S

Answer 28

CuSO₄ (aq) + Na₂S (aq) —> CuS (s) + Na₂SO₄ (aq)

Question 29

Single Displacement

More active halogens will displace less active halogens.

Answer 29

Cl₂ (g) + 2NaBr (aq) —> 2NaCl (aq) + Br₂ (aq)

Question 30

Synthesis

Acid anhydride with basic anhydride will form a salt.

Answer 30

P₂O₅ (s) + 3BaO (s) —> Ba₃(PO₄)₂ (s)

Question 31

Synthesis

Acid anhydride with basic anhydride will form a salt.

Answer 31

CO₂ (g) + Na₂O (s) —> Na₂CO₃ (s)

Question 32

Double Displacement

A + B = S + H₂O

Answer 32

2KOH (aq) + H₂SO₄ (aq) —> K₂SO₄ (aq) + 2H₂O (l)

Question 33

Synthesis

Acid anhydride with water will give an acid.

Answer 33

CO₂ (g) + H₂O (l) —> H₂CO₃ (aq)

Question 34

Synthesis

Basic anhydride with water will form a base.

Answer 34

Na₂O (s) + H₂O (l) —> 2NaOH (aq)

Question 35

Double Displacement

S + A = 2^nd S + 2^nd A

Answer 35

2NaCl (aq) + H₂SO₄ (aq) —> Na₂SO₄ (aq) + 2HCl (g)

Question 36

Single Displacement

Active metals (Na, Ca, K) reacts with water will give a metallic hydroxide and hydrogen gas.

Answer 36

Ca (s) + 2H₂O (l) —> Ca(OH)₂ (aq) + H₂ (g)

Question 37

Decomposition

Acids when heated will decompose to water and acid anhydride.

Answer 37

H₂SO₃ (aq) —> SO₂ (g) + H₂O (l)

Question 38

Single Displacement

Active metal (Zn, Fe, Al) displaces hydrogen in acids to give a salt and hydrogen gas.

Answer 38

Zn (s) + 2HCl (aq) —> ZnCl₂ (aq) + H₂ (g)

Question 39

Decomposition

Compounds that are decomposed into elements by electricity.

Answer 39

2NaCl (l) —> 2Na (l) + Cl₂ (g)

Question 40

Decomposition

Some metallic carbonates when heated will decompose to metallic oxide and carbon dioxide.

Answer 40

Li₂CO₃ (s) —> Li₂O (s) + CO₂ (g)

Question 41

Decomposition

Bases when heated will decompose to water and basic anhydride.

Answer 41

Ca(OH)₂ (s) —> CaO (s) + H₂O (g)