A cyanide ion-selective electrode obeys the equation given below.E = constant − 0.05916 log [CN− ]...
A cyanide ion-selective electrode obeys the equation given
below.E = constant − 0.05916 log
[CN
− ]
The potential was −0.237 V when the electrode was immersed in 1.21 mM NaCN. (Assume that the Nernst potential is 0.05916 V.)
(a) Evaluate the constant in the above equation.
c = _____?_____V
(b) Using the result from part (a), find [CN− ] if
E = −0.318 V.
| −0.318 | = | c − 0.05916 log(x) |
| x | = | ___?___ mM |
(c) Without using the constant from part (a), find
[CN− ] if
E = −0.318 V.
| −0.237 | = | c − 0.05916 log(1.21 mM) | |
| −0.318 | = | c − 0.05916 log(y) | |
| − | |||
| y | = | ____?__ mM | |
Homework Answers
![. The eyanide ion-selective electrode obeys the equation . Es const. - 0.05916 log [en] .....(j (a) E= -0.237V when the elect](http://img.homeworklib.com/questions/25c784c0-77de-11ea-9af2-e541d52f571d.png?x-oss-process=image/resize,w_560)
![0.05916 - or, log [en] = -0.4096 + 0.318 -0.0916 0.05916 or log [eN] = - 1:548 or, [ew] = 181.548) 3. Ten] 2 0.0283.(M). = 2](http://img.homeworklib.com/questions/26774ff0-77de-11ea-9d32-657bf5f81a3a.png?x-oss-process=image/resize,w_560)
![- or, log [ew] +.2.917 = 1.369 or log [ew] = 1.369-2.917= -1,548 or, ly [cm] = -1.548 . or; [en] = 101.548 : [en] = 0.0283(m](http://img.homeworklib.com/questions/2700b160-77de-11ea-8d75-c3ce60aff2fc.png?x-oss-process=image/resize,w_560)
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A cyanide ion-selective electrode obeys the equation given
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