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In this case, zinc will undergo oxidation and copper ions will experience reduction. The reduction half-reaction is Cu^2+ (aq) + 2e^- → Cu (s), and the oxidation half-reaction is Zn (s) → Zn^2+ (aq) + 2e^-. Overall, the reaction is Zn (s) + Cu^2+ (aq) → Zn^2+ (aq) + Cu (s).
Zn(s)-> Zn2+(aq)+2e- and Ni2+(aq) + 2e- ->Ni(s)
In a hydrolysis reaction, K^+, Ba^2+, Cu^2+, Zn^2+, F^-, SO3^2-, and Cl^- ions may react with water to form corresponding hydroxide ions (OH^-) and their respective cations. For example, K^+ reacts with water to form KOH and H^+ ions.
To produce a spontaneous reaction in an electrochemical cell, the half-reaction at the anode must involve the oxidation of a species. If the cathode half-reaction is a reduction, such as the reduction of a metal ion to its elemental form, the corresponding anode half-reaction could be the oxidation of that metal to its ion. For example, if the cathode reaction is ( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} ), the anode reaction could be ( \text{Zn} \rightarrow \text{Zn}^{2+} + 2e^- ), where zinc is oxidized to provide electrons for the reduction at the cathode.
The reduction half-reaction for this reaction is: Zn^2+ + 2e- -> Zn(s).
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Zn^2+ + 2e- ––> Zn(s)
In this case, zinc will undergo oxidation and copper ions will experience reduction. The reduction half-reaction is Cu^2+ (aq) + 2e^- → Cu (s), and the oxidation half-reaction is Zn (s) → Zn^2+ (aq) + 2e^-. Overall, the reaction is Zn (s) + Cu^2+ (aq) → Zn^2+ (aq) + Cu (s).
Zn2+(aq) +2e- => Zn(s) and Mg(s) => Mg2+(aq) + 2e-
The half-reaction for this redox reaction could be written as: Zn(s) -> Zn2+(aq) + 2e-. This indicates the oxidation of solid zinc (Zn) to zinc ions (Zn2+) and the release of 2 electrons.
Zn(s)-> Zn2+(aq)+2e- and Ni2+(aq) + 2e- ->Ni(s)
Balanced chemical equation: Zn (s) + 2HCl (aq) --> ZnCl2 (aq) + H2 (g) Oxidation half-reaction: Zn (s) --> Zn2+ (aq) + 2e- Reduction half-reaction: 2H+ (aq) + 2e- --> H2 (g)
Well, I'm not entirely sure what you're asking. In this reaction equation: Ba + ZnSO4 --> BaSO4 + Zn, barium is a reactant. The equation is balanced as is, so everything is in a nice even 1-to-1 molar ratio, making stoichiometric calculations pretty easy. That's about all I can tell you though, based on the limited information present.
MgCl2 aq plus Zn s is the oxidation half-reaction for Mg s plus ZnCl2 aq.
The reaction "Zn (s) + 2HCl (aq) -- H2 (g) + ZnCl2 (s)" is not a double-displacement reaction. It is a single displacement reaction where Zn displaces H from HCl to form ZnCl2 and H2 gas.
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