58 650
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Physical Chemistry Question for witch

Question #8479
Calculate how much (as grams) the following elements are needed to produce a charge equal to the Faraday’s constant. Electron charge is 1.602*10^–19 As
a) Li (using Li/Li+)
b) Zn (using Zn/Zn2+)
Expert's answer
m = (Q/F)*(M/z)

is the mass of the substance liberated at an electrode in grams
Q is the total electric charge passed through the substance
F = 96,485 C mol−1 is the Faraday constant
M is the molar mass of the substance
z is the valency number of ions of the substance (electrons transferred per ion)

For Li

m = 1.602*10–19/96,485 * 6.94/1 = 1.15*10–20

for Zn

m = 1.602*10–19/96,485 * 65.38/2 = 5.4277*10-20

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question