Question 18 please provide steps thanks r2 (aq) + 103(aq) Br-(aq)+ 10 (aq) What

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Question 18 please provide steps thanks

r2 (aq) + 103(aq) Br-(aq)+ 10 (aq) What is the ratio of coefficients for Br2 to IO3 in the balanced net ionic reaction? B. 2:1 C. 1:2 D. 2:3 E. 3:2 exposed to the atmosphere, where the prevailing pressure is 745 torr. The mercury level in the open arm is 50. mm below that in the arm connected to the flask of neon. What is the neon 4. A flask containing neon gas is connected to an open-ended mercurym pressure, in torr? A. -50. torr B. 50. torr C. 695 torr D. 710 torr E. 795 torr Exam 2, CHE 131 Fall 2016, Version A, Page 4 of 8 16. A 0.850-mole sample 20.46 L at 123 C and A. 5.38L B. 10.9L C. 19.0L D. 38.3 L 17. A student adds 0.161 be 736 torr at 300

Explanation / Answer

Br in Br2 has oxidation state of 0

Br in Br- has oxidation state of -1

So, Br in Br2 is reduced to Br-

I in IO3- has oxidation state of +5

I in IO4- has oxidation state of +7

So, I in IO3- is oxidised to IO4-

Reduction half cell:

Br2 + 2e- --> 2 Br-

Oxidation half cell:

IO3- --> IO4- + 2e-

Number of electrons is same in both half reactions.

So, balancing of electrons is not required. It's already balanced

Lets combine both the reactions.

1 Br2 + 1 IO3- --> 2 Br- + 1 IO4-

Balance Oxygen by adding water

1 Br2 + 1 IO3- + 1 H2O --> 2 Br- + 1 IO4-

Balance Hydrogen by adding H+

1 Br2 + 1 IO3- + 1 H2O --> 2 Br- + 1 IO4- + 2 H+

Answer: 1:1

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