The electrochemical cell depicted below is set up and operated in a \"spontaneou
ID: 923687 • Letter: T
Question
The electrochemical cell depicted below is set up and operated in a "spontaneous" direction so that Prof. Dula Amarasiriwardena can power his ipod. The ingredients or the cell are Zn (s), Zn^2+ (aq), Cu (s), and Cu^2+ (aq). Which of the following statements is true regarding the cell? Electrons travel from the Zn electrode to the Cu electrode through the salt bridge. Electrons travel from the Cu electrode to the Zn electrode through the salt bridge. Electrons travel from the Cu electrode to the Zn electrode through the iPod. Electrons travel from the Zn electrode to the Cu electrode through the iPod. Sulfate ions travel through the iPod. Which of the following electron transfer reactions is not correctly categorized? 2 Zn (s) + O_2 (g) rightarrow ZnO (s); combination reaction 2 HgO (s) rightarrow 2 Hg (I) + O_2 (g); halogen displacement reaction Cr^2+ (aq) + Fe^3+ (aq) rightarrow Cr^3+ (aq) + Fe^2+ (aq); electron exchange reaction Fe (s) + Cu^2+ (aq) Fe^2+ (aq) + Cu (s); metal displacement reaction Ca (s) + 2 H^+ (aq) rightarrow Ca^2+ (aq) + H_2 (g); hydrogen displacement reaction Consider the following reaction: 2 Ce^4+ (aq) + 2 Br^- (aq) rightarrow 2 Ce^3+ (aq) + Br_2 (l) Which of the following best describes this reaction?Explanation / Answer
7. (A) option would be the correct that electrons travels from Zn electrode to the Cu electrode through the salt bridge.
In any electrochemical process,electrons flow driven by redox reaction.A redox reaction occurs when electrons are transferred from a substance that is oxidised to one that is reduced.The salt bridge allows charges to be neutarlised by the flow of anions into the Zn2+ solution and the flow of cations to the Cu2+ soluton.In the absence of the salt bridge or some other similar connection, the raection would rapidly cease because electrical neutrality could not be maintained.
8. (B) is not correctly catogrised. Rest of all are right.
This reaction would be of type Decomposition reaction.
A decomposition recation is the breakdown of a compound into one or more single elements.
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