Question

identifying the 5 types of chemical reactions
identify each of the reactions below as one of the 5 types of reactions (rxn):

• synthesis reaction
• decomposition reaction
• single replacement reaction
• double replacement reaction
• combustion reaction

reactions (identify pattern below) name of reaction type

1. 2 na + cl₂ → 2 nacl

ex: a b → ab (a & b combine) ex: synthesis

1. pb + feso₄ → pbso₄ + fe
2. p₄ + 3 o₂ → 2 p₂o₃
3. 2 no₂ → 2 o₂ + n₂
4. na₃po₄ + 3 koh → 3 naoh + k₃po₄
5. c₃h₆o + 4 o₂ → 3 co₂ + 3 h₂o
6. mgcl₂ + li₂co₃ → mgco₃ + 2 licl
7. c₆h₁₂ + 9 o₂ → 6 co₂ + 6 h₂o
8. caco₃ → cao + co₂
9. 2 agno₃ + cu → cu(no₃)₂ + 2 ag
10. 2h₂ + o₂ → 2h₂o

Explanation:

Step1: Recall reaction - type definitions

Synthesis: A + B → AB; Decomposition: AB → A + B; Single - replacement: A+BC → AC + B; Double - replacement: AB + CD → AD+CB; Combustion: Hydrocarbon + O₂ → CO₂ + H₂O.

Step2: Analyze reaction 2

Pb + FeSO₄ → PbSO₄ + Fe. Here, lead (Pb) replaces iron (Fe) in FeSO₄. It is a single - replacement reaction.

Step3: Analyze reaction 3

P₄+3O₂ → 2P₂O₃. Phosphorus (P₄) and oxygen (O₂) combine to form P₂O₃. It is a synthesis reaction.

Step4: Analyze reaction 4

2NO₂ → 2O₂ + N₂. A single compound NO₂ breaks down into two simpler substances O₂ and N₂. It is a decomposition reaction.

Step5: Analyze reaction 5

Na₃PO₄ + 3KOH → 3NaOH + K₃PO₄. The positive and negative ions in Na₃PO₄ and KOH exchange places. It is a double - replacement reaction.

Step6: Analyze reaction 6

C₃H₆O + 4O₂ → 3CO₂ + 3H₂O. A compound containing carbon, hydrogen, and oxygen reacts with oxygen to produce carbon dioxide and water. It is a combustion reaction.

Step7: Analyze reaction 7

MgCl₂ + Li₂CO₃ → MgCO₃ + 2LiCl. The ions in MgCl₂ and Li₂CO₃ exchange places. It is a double - replacement reaction.

Step8: Analyze reaction 8

C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O. A hydrocarbon reacts with oxygen to produce carbon dioxide and water. It is a combustion reaction.

Step9: Analyze reaction 9

CaCO₃ → CaO + CO₂. A single compound CaCO₃ breaks down into two simpler substances CaO and CO₂. It is a decomposition reaction.

Step10: Analyze reaction 10

2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag. Copper (Cu) replaces silver (Ag) in AgNO₃. It is a single - replacement reaction.

Step11: Analyze reaction 11

2H₂ + O₂ → 2H₂O. Hydrogen (H₂) and oxygen (O₂) combine to form water (H₂O). It is a synthesis reaction.

Answer:

1. single - replacement
2. synthesis
3. decomposition
4. double - replacement
5. combustion
6. double - replacement
7. combustion
8. decomposition
9. single - replacement
10. synthesis