# chemistry

the quantity of electricity required to reduce 12.3g of nitrobenzene to aniline assuming 50% current efficiency is
1. 115800 C
2. 57900 C
3. 231600 C
4. 28950 C

1. 👍 3
2. 👎 3
3. 👁 2,472
1. You multiply 12.3 by .50 to get 6.15 so none of those are the answer. simple!

1. 👍 0
2. 👎 15
2. Check my thinking on this.
C6H5NO2 ==> C6H5NH2
molar mass C6H5NO2 = 123

Change of electrons is 6, N going from +5 oxidation state to -1 oxidation state or gain of 6 electrons.

Therefore, 1 Faraday or 96,485 coulombs will reduce 123/6 = 20.5 g C6H5NO2. But since the efficiency is only 50%, it will reduce only half that amount or 20.5/2 = 10.25 g or 10.25/123 = 0.08333 mole.

How many moles do we have? That is 12.3/123 = 0.1; therefore,
# coulombs = 96,485 C x (0.1/0.08333)= ??
Check my work.

1. 👍 4
2. 👎 7
posted by DrBob222
3. 57900

1. 👍 4
2. 👎 1
4. Change in o.s=6
Now 6 F is req'd to reduce 1 mole
Therefore for 12.3/123=0.1 mole we need
0.1*6=0.6 F
But since current is 50℅ efficient..
Therefore for 0.6 we need 0.6*2=1.2 F
1.2*96500=115800 C

1. 👍 7
2. 👎 3
5. Mole=6×12.3/123=0.6
Charge= 0.6×96500
As 50% efficiency
So, 2×0.6×96500=115800 C

1. 👍 1
2. 👎 0
6. mishra

1. 👍 0
2. 👎 0
posted by ayush
7. Change in o.s=6e=6f
123g req.6f
But efficiency is half 50%so
123g req 12f so,
12.3g req 12*12.3/123
=1.2f
In coulomb 1.2*96500=115800

1. 👍 1
2. 👎 0

## Similar Questions

1. ### Organic Chemistry

One synthetic preparation of aniline involves reducing nitrobenzene with iron and HCL, and then steam distilling the resultant aniline at 99C. How much aniline codistills with each gram of water during steam distillation? I do not

2. ### Chemistry

1. Isolation of aniline by steam distillation. (a) Why is NaOH added before performing thedistillation? (b) Suggest a reason for the milky appearance of the distillate and for the change in appearance upon addition of HCl. After

asked by Lindz on October 19, 2006
3. ### chem

why is aniline soluble in HCl and nitrobenzene not?

asked by Anonymous on October 24, 2017
4. ### chemistry

Aniline (MW93 g/mol) co-distills with water 98.2 C. The vapor pressure of water at 98.2 C is 717 mmHg. You need to isolate 10 g of aniline. What is the minimum volume of water required to isolate 10 g of aniline in a steam

asked by Anna on November 2, 2014
5. ### More Economics

I have an lazy instructor using test bank questions unrelated to my text and need some help. The second question is "anything that makes the efficiency wage rise relative to the market-clearing wage will...A) increase both the

asked by Bryan on June 16, 2007
6. ### science

A certain quantity of electricity deposits 0.54grams of silver nitrate solution. What volume of H2 will be liberated by the same quantity of electricity at 27 ° C and 750 mm of Hg pressure

asked by Navneeta on August 26, 2015
7. ### economic

ASSIGNMENT 5: DUE 4.00PM, 4/09/08 1. A competitive firm uses coal to generate electricity. Its supply curve is Q = 300P - 1000, where Q is quantity produced (units of electricity per year), and P is market price of electricity per

asked by qweiop90 on September 2, 2008
8. ### water treatment,chemistry

If the RQ is 6 and the k2t is 4, what is the removal efficiency of (CO2) of the co-current tower aerator. What will be the efficiency if a tower aeration with counter current flow is used instead? The efficiency of the co-current

asked by Anonymous on October 4, 2013
9. ### More Economics

I have an lazy instructor using test bank questions unrelated to my text and need some help. The second question is "anything that makes the efficiency wage rise relative to the market-clearing wage will...A) increase both the

asked by Bryan on June 16, 2007
10. ### again economics

okay got one more and in this one I need help, cuz I simply don't understand it!! The question: S^P=I+CA-S^G=I+CA+(G-T) this equation tells us that to reduce a current account deficit , a country must increase its privat savings ,

asked by Ange on January 22, 2007

More Similar Questions