sorry about that. the server was down and didnt properly upload my picture. 1. R

Question

sorry about that. the server was down and didnt properly upload my picture.

1. Refer to the diagram below to answer the following questions. The U-tube contains 1.0 M MgBrz O Power Source Part A: When the power source supplies a voltage of 2.0 V, the solution becomes brown near one of the electrodes, while bubbles form at the other electrode. Write the half- reactions that occur at each of the electrodes in this electrolytic cell. Left side: Right side: Part B: On which side does the solution turn brown? Part C: Which side is the anode?

Explanation / Answer

In the solution two reactions will occur .

4Br- + 4e- -------> 2Br2

4H2O -----> 2O2 + 4H+ + 4e-

So, Br- is reduced to formBr2 gas and H2O is oxidised to form O2 gas. Oxidation occurs at anode and reduction at cathode. So, Br_ --> Br2 will occur at anode and H2O-----> O2 will occur at cathode.

Left side is negative terminal. this is anode where brown color will form

right side is positive terminal where

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