Generate Quiz 68DEEAAED18D7

A protective layer forms around the metal as a result of interactions between metals made possible by alloying. The metal can be protected by coating it with a less reactive metal because it corrodes more slowly. By painting the surface, the metal can be isolated from its environment and prevented from reacting.

Salt bridges are made with a saturated KCl solution. due to its relative inertness. Salt bridges primarily use inert electrolytes.

Different electrode potential values in a voltaic cell cause the “chemical energy” to be transformed into electrical energy as a result of the elements, ions, and compounds in the solution spontaneously oxidizing and reducing.

The number ‘+17’ is the right choice.

The ion-electron method will be used to balance this. Determine the RHS’s net charge using the equation; the LHS’s net charge should be the same. For the equation to be balanced, there must be no net ionic charge on either side.

The EMF series aids in assessing a reaction’s viability. An element lower in the series can be reduced or replaced by any element higher up. As an illustration,

Zn + Cu2+ → Zn2+ + Cu

Zn2+ + Cu → Zn + Cu2+

We can determine that the first reaction is feasible and the second is not by using our knowledge of the activity series. This is because Cu functions as an oxidizing agent because it is higher in the series than Zn. The second reaction is not possible because Zn cannot oxidize Cu.

One type of secondary cell (rechargeable) that effectively transforms chemical energy into electrical energy is a fuel cell. It is utilized in spacecraft to supply electricity and clean drinking water for astronauts while they are in orbit. Hollow tubes of porous carbon impregnated with platinum, which serves as a catalyst, make up electrodes. KOH, a potent electrolyte, is utilized. H2 is oxidized to water at the anode and O2 is reduced to hydroxide ions at the cathode. KOH, or option A, is the proper electrolyte as a result. The fuel cell setup is depicted below.

The standard electrode potential is measured at solutions of 298K, 1 atm, or 1 M. (Reality)

B is accurate since concentration determines the ion charge order in an electrolytic cell.The discharge is easier at higher concentrations.

Emf(oxidation) – Emf(reduction) yields the emf in an electrochemical cell.or Emf + Emf (oxidation + reduction)