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Sagot :
Let's analyze each reaction using the activity series where the reactivity of metals decreases from left to right:
1. Reaction: Ag + NaNO₃
- Silver (Ag) is less reactive than Sodium (Na).
- According to the activity series, a less reactive metal cannot displace a more reactive metal from its compound.
- Therefore, no reaction occurs.
- Result: Ag + NaNO₃ → No reaction
2. Reaction: Fe + Al₂O₃
- Iron (Fe) is less reactive than Aluminum (Al).
- According to the activity series, Iron cannot displace Aluminum from its compound.
- Therefore, no reaction occurs.
- Result: Fe + Al₂O₃ → No reaction
3. Reaction: Ni + NaCl
- Nickel (Ni) is less reactive than Sodium (Na).
- According to the activity series, Nickel cannot displace Sodium from its compound.
- Therefore, no reaction occurs.
- Result: Ni + NaCl → No reaction
4. Reaction: Fe + Cu(NO₃)₂
- Iron (Fe) is more reactive than Copper (Cu).
- According to the activity series, a more reactive metal can displace a less reactive metal from its compound.
- Therefore, Iron displaces Copper from Copper Nitrate to form Iron Nitrate and Copper.
- Result: Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu
Summary of Reactions:
1. Ag + NaNO₃ → No reaction
2. Fe + Al₂O₃ → No reaction
3. Ni + NaCl → No reaction
4. Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu
1. Reaction: Ag + NaNO₃
- Silver (Ag) is less reactive than Sodium (Na).
- According to the activity series, a less reactive metal cannot displace a more reactive metal from its compound.
- Therefore, no reaction occurs.
- Result: Ag + NaNO₃ → No reaction
2. Reaction: Fe + Al₂O₃
- Iron (Fe) is less reactive than Aluminum (Al).
- According to the activity series, Iron cannot displace Aluminum from its compound.
- Therefore, no reaction occurs.
- Result: Fe + Al₂O₃ → No reaction
3. Reaction: Ni + NaCl
- Nickel (Ni) is less reactive than Sodium (Na).
- According to the activity series, Nickel cannot displace Sodium from its compound.
- Therefore, no reaction occurs.
- Result: Ni + NaCl → No reaction
4. Reaction: Fe + Cu(NO₃)₂
- Iron (Fe) is more reactive than Copper (Cu).
- According to the activity series, a more reactive metal can displace a less reactive metal from its compound.
- Therefore, Iron displaces Copper from Copper Nitrate to form Iron Nitrate and Copper.
- Result: Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu
Summary of Reactions:
1. Ag + NaNO₃ → No reaction
2. Fe + Al₂O₃ → No reaction
3. Ni + NaCl → No reaction
4. Fe + Cu(NO₃)₂ → Fe(NO₃)₂ + Cu
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