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**Types of Reactions WS 2**

**Instructions:**
First, write the formula or name for each reactant and product. Then, determine the type of reaction by circling the abbreviation.

- [tex]S =[/tex] synthesis
- [tex]D =[/tex] decomposition
- [tex]SR =[/tex] single replacement
- [tex]DR =[/tex] double replacement
- [tex]C =[/tex] combustion
- [tex]NR =[/tex] no reaction

1. **Iron + Sulfur [tex]\rightarrow[/tex] Iron (II) sulfide**
Formulas: Fe + S [tex]\rightarrow[/tex] FeS
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

2. **[tex]N_2 + H_2 \rightarrow NH_3[/tex]**
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

3. **Zinc + Copper (II) sulfate [tex]\rightarrow[/tex] Zinc sulfate + Copper**
Formulas: Zn + CuSO_4 [tex]\rightarrow[/tex] ZnSO_4 + Cu
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

4. **[tex]KNO_3 + NaBr \rightarrow NaNO_3 + KBr[/tex]**
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

5. **Potassium chlorate + Heat [tex]\rightarrow[/tex] Potassium chloride + Oxygen**
Formulas: KClO_3 + heat [tex]\rightarrow[/tex] KCl + O_2
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

6. **Magnesium nitrate + Calcium iodide [tex]\rightarrow[/tex] Calcium nitrate + Magnesium iodide**
Formulas: Mg(NO_3)_2 + CaI_2 [tex]\rightarrow[/tex] Ca(NO_3)_2 + MgI_2
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

7. **Potassium + Lead(II) iodide [tex]\rightarrow[/tex] Potassium iodide + Lead**
Formulas: K + PbI_2 [tex]\rightarrow[/tex] KI + Pb
Reaction Type: [tex]S \quad D \quad SR \quad DR \quad C \quad NR[/tex]

Answer :

Sure! Let's go through each reaction step-by-step and identify the type of chemical reaction.

1. Iron + sulfur → iron (II) sulfide

- Reactants: Iron (Fe) and sulfur (S)
- Product: Iron (II) sulfide (FeS)
- This reaction combines two elements to form a single compound, which is characteristic of a synthesis reaction.
- Type of reaction: Synthesis (S)

2. N₂ + H₂ → NH₃

- Reactants: Nitrogen gas (N₂) and hydrogen gas (H₂)
- Product: Ammonia (NH₃)
- Here, two simpler molecules combine to form a more complex molecule, which also is a synthesis reaction.
- Type of reaction: Synthesis (S)

3. Zinc + copper (II) sulfate → zinc sulfate + copper

- Reactants: Zinc (Zn) and copper (II) sulfate (CuSO₄)
- Products: Zinc sulfate (ZnSO₄) and copper (Cu)
- Zinc replaces copper in the sulfate compound, indicating a single replacement reaction.
- Type of reaction: Single Replacement (SR)

4. KNO₃ + NaBr → NaNO₃ + KBr

- Reactants: Potassium nitrate (KNO₃) and sodium bromide (NaBr)
- Products: Sodium nitrate (NaNO₃) and potassium bromide (KBr)
- The ions are exchanged between the compounds to form new compounds, which characterizes a double replacement reaction.
- Type of reaction: Double Replacement (DR)

5. Potassium chlorate + heat → potassium chloride + oxygen

- Reactants: Potassium chlorate (KClO₃) decomposes with heat
- Products: Potassium chloride (KCl) and oxygen gas (O₂)
- A single compound breaks down into simpler substances, which is a decomposition reaction.
- Type of reaction: Decomposition (D)

6. Magnesium nitrate + calcium iodide → calcium nitrate + magnesium iodide

- Reactants: Magnesium nitrate (Mg(NO₃)₂) and calcium iodide (CaI₂)
- Products: Calcium nitrate (Ca(NO₃)₂) and magnesium iodide (MgI₂)
- This reaction also involves an exchange of ions, indicating a double replacement reaction.
- Type of reaction: Double Replacement (DR)

7. K + PbI₂ → KI + Pb

- Reactants: Potassium (K) and lead (II) iodide (PbI₂)
- Products: Potassium iodide (KI) and lead (Pb)
- Potassium replaces lead in the iodide compound, which is a characteristic of a single replacement reaction.
- Type of reaction: Single Replacement (SR)

These steps summarize each reaction and its corresponding type. If you have any more questions or need further clarification, feel free to ask!

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Rewritten by : Barada