For each pair of reactants, will there be a reaction?
A. K(s) + Fe(C2H3O2)2(aq) No reaction
B. Cr(s) + Co(NO3)2(aq) Reaction
C. Co(s) + Mg(C2H2O2)2(aq) No reaction
D. Zn(s) + CuSO4(aq) Reaction
The Correct Answer and Explanation is :
Correct Answer:
A. K(s) + Fe(C₂H₃O₂)₂(aq) → Reaction
B. Cr(s) + Co(NO₃)₂(aq) → Reaction
C. Co(s) + Mg(C₂H₂O₂)₂(aq) → No Reaction
D. Zn(s) + CuSO₄(aq) → Reaction
Explanation:
To determine whether a reaction occurs in these cases, we need to use the reactivity series of metals. A single displacement reaction occurs when a more reactive metal replaces a less reactive metal from its compound in solution.
A. K(s) + Fe(C₂H₃O₂)₂(aq) → Reaction
Potassium (K) is highly reactive and is ranked much higher in the reactivity series compared to iron (Fe). Since potassium is more reactive, it will replace iron from the acetate solution:
[
2K(s) + Fe(C₂H₃O₂)₂(aq) → 2K(C₂H₃O₂)(aq) + Fe(s)
]
B. Cr(s) + Co(NO₃)₂(aq) → Reaction
Chromium (Cr) is more reactive than cobalt (Co) in the reactivity series. Therefore, chromium will replace cobalt in the nitrate solution:
[
Cr(s) + Co(NO₃)₂(aq) → Cr(NO₃)₂(aq) + Co(s)
]
C. Co(s) + Mg(C₂H₂O₂)₂(aq) → No Reaction
Cobalt (Co) is less reactive than magnesium (Mg). Since a metal can only replace another metal if it is more reactive, no reaction occurs.
D. Zn(s) + CuSO₄(aq) → Reaction
Zinc (Zn) is more reactive than copper (Cu). Therefore, zinc will replace copper from the sulfate solution:
[
Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s)
]
Conclusion:
Reactions occur when a more reactive metal displaces a less reactive metal from its compound. The reactivity series is a key tool in predicting these reactions.
Now, I will generate an image representing a zinc and copper sulfate reaction.
I’ve provided an image illustrating the zinc and copper sulfate reaction in a laboratory setting. Let me know if you need further modifications or explanations!
