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What occurs at the cathode of a galvanic cell?
An oxidation half-reaction
What happens to redox reaction when it shown as half reactions?
The redox reaction is split into its oxidation part and its reduction part.
What occurs in a half-cell?
Either oxidation or reduction but never both at the same time
Does anode gain mass?
I'm not completely certain about this but I'm convinced that an anode actually loses mass. For example, in the cell equations for an Ag(s) cathode being dipped into an AgNO3 solution, connected to a Cu(s) anode being dipped into a Cu(NO3)2 solition, 2Ag+(aq) + 2e- -> 2Ag(s) (Cathode 1/2 reaction, reduction) Cu(s) -> Cu2+(aq) +2e- (Anode 1/2 reaction, oxidation) , the cathode reaction is taking the Ag+(aq) ions in the AgNO3- solution and turning them into solid silver, Ag(s). Therefore, I believe it is correct to assume that solid silver is being formed in the cathode solution. The anode half reaction however is the opposite, taking a solid copper atom, Cu(s), and turning it into an aqueous copper cation, Cu2+(aq). This leads me to believe that the copper rod (anode) is losing mass. So, I believe the cathode is gaining mass and the anode is losing mass.
In what type of cell division does the chromosome number reduce by one half and gametes form?
Meiosis produces gametes which have half the number of chromosomes that other cells of the body have.
What is the reduction half-reaction for Mg(s) ZnCl2(aq) MgCl2(aq) Zn(s)?
Mg(s) Mg2+ + 2e-
What is the oxidation half-reaction for Mg s plus ZnCl2 aq --- MgCl2 aq plus Zn s?
MgCl2 aq plus Zn s is the oxidation half-reaction for Mg s plus ZnCl2 aq.
What is the balanced chemical equation for the reaction of zinc with dilute hydrochloric acid and equation of it's oxidation half reaction also reduction half reaction?
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)
What do half-reaction show?
They show the oxidation an reduction half's of a reaction seperately
Single reaction where oxidation and reduction take?
half reaction
What pair of half- reactions would have a negative total reduction potential?
silver reduced , gold oxidized
What is the reduction half-reaction for Mg(s) ZnCI2(aq)MgCI2(aq) Zn(s)?
The reduction half-reaction for this reaction is: Zn^2+ + 2e- -> Zn(s).
How is an oxidation half reaction written using the reduction potential chart?
To write an oxidation half reaction using the reduction potential chart, simply reverse the reduction half reaction from the chart. This means changing the sign of the reduction potential value and flipping the direction of the reaction arrow. Remember to balance the reaction by adding any necessary electrons.
Which pairs of half-reactions would have a negative total reduction potential?
Any pair of half-reactions where the reduction potential of the half-reaction being oxidized is greater than the reduction potential of the half-reaction being reduced will have a negative total reduction potential. This results in a thermodynamically unfavorable reaction.
What occurs at the cathode of the galvanic cell?
The reduction half-reaction of a redox reaction
What are the reduction half reaction for 2mg o2 to 2mgo?
The reduction half-reaction for 2MgO2 to 2MgO is: O2 + 4e- -> 2O2-.
What is the reduction of water half reaction?
The reduction of water half reaction involves the gain of electrons by water molecules, leading to the formation of hydrogen gas and hydroxide ions.
