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Sagot :
Let's examine each reaction step-by-step to see if it will occur based on the activity series provided.
1. Reaction: [tex]\(2 \text{NaBr} + I_2 \rightarrow 2 \text{NaI} + Br_2\)[/tex]
This reaction involves nonmetals. According to the activity series [tex]\(F > Cl > Br > I\)[/tex]:
- Iodine (I) is below Bromine (Br) in the series.
In order for the reaction to proceed, iodine must be able to replace bromine. Since iodine is less reactive than bromine, it cannot replace bromine. Hence, this reaction will not occur.
Result: False
2. Reaction: [tex]\(2 \text{Fe} + \text{Al}_2\text{O}_3 \rightarrow 2 \text{Al} + \text{Fe}_2\text{O}_3\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Aluminium (Al) is above Iron (Fe) in the series.
For the reaction to proceed, iron must be able to replace aluminium. Since iron is less reactive than aluminium, it cannot replace aluminium. Therefore, this reaction will not occur.
Result: False
3. Reaction: [tex]\(2 \text{AgNO}_3 + \text{Ni} \rightarrow \text{Ni}(\text{NO}_3)_2 + 2 \text{Ag}\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Nickel (Ni) is above Silver (Ag) in the series.
For the reaction to proceed, nickel must be able to replace silver. Since nickel is more reactive than silver, it can replace silver. Therefore, this reaction will occur.
Result: True
4. Reaction: [tex]\(\text{Pb} + \text{Zn}(\text{C}_2\text{H}_3\text{O}_2)_2 \rightarrow \text{Zn} + \text{Pb}(\text{C}_2\text{H}_3\text{O}_2)_2\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Zinc (Zn) is above Lead (Pb) in the series.
For the reaction to proceed, zinc must be able to replace lead. Since zinc is more reactive than lead, lead cannot replace zinc. Therefore, this reaction will not occur.
Result: False
In summary:
- Reaction 1: False
- Reaction 2: False
- Reaction 3: True
- Reaction 4: False
1. Reaction: [tex]\(2 \text{NaBr} + I_2 \rightarrow 2 \text{NaI} + Br_2\)[/tex]
This reaction involves nonmetals. According to the activity series [tex]\(F > Cl > Br > I\)[/tex]:
- Iodine (I) is below Bromine (Br) in the series.
In order for the reaction to proceed, iodine must be able to replace bromine. Since iodine is less reactive than bromine, it cannot replace bromine. Hence, this reaction will not occur.
Result: False
2. Reaction: [tex]\(2 \text{Fe} + \text{Al}_2\text{O}_3 \rightarrow 2 \text{Al} + \text{Fe}_2\text{O}_3\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Aluminium (Al) is above Iron (Fe) in the series.
For the reaction to proceed, iron must be able to replace aluminium. Since iron is less reactive than aluminium, it cannot replace aluminium. Therefore, this reaction will not occur.
Result: False
3. Reaction: [tex]\(2 \text{AgNO}_3 + \text{Ni} \rightarrow \text{Ni}(\text{NO}_3)_2 + 2 \text{Ag}\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Nickel (Ni) is above Silver (Ag) in the series.
For the reaction to proceed, nickel must be able to replace silver. Since nickel is more reactive than silver, it can replace silver. Therefore, this reaction will occur.
Result: True
4. Reaction: [tex]\(\text{Pb} + \text{Zn}(\text{C}_2\text{H}_3\text{O}_2)_2 \rightarrow \text{Zn} + \text{Pb}(\text{C}_2\text{H}_3\text{O}_2)_2\)[/tex]
This reaction involves metals. According to the activity series [tex]\( \text{Al} > \text{Mn} > \text{Zn} > \text{Cr} > \text{Fe} > ... > \text{Pt} \)[/tex]:
- Zinc (Zn) is above Lead (Pb) in the series.
For the reaction to proceed, zinc must be able to replace lead. Since zinc is more reactive than lead, lead cannot replace zinc. Therefore, this reaction will not occur.
Result: False
In summary:
- Reaction 1: False
- Reaction 2: False
- Reaction 3: True
- Reaction 4: False
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