When an athlete gets hurt they apply sometimes an instant cold pack to the injury. the instant cold pack works by mixing two che
2 answers:
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Solution :
Cd(s) ----------------------> (aq) + 2
,
= 0.34 v
(aq) + 2
------------> Cu (s) ,
= -0.04 v
----------------------------------------------------------------------------------------------
Cd(s) + (aq) ------------->
(aq) + Cu (s) ,
= 0.30 v
The cell potential is defined as the measure of between the
of an electrochemical cell.
<u>Answer:</u> The equilibrium concentration of ion is
<u>Explanation:</u>
We are given:
Molarity of oxalic acid solution = 0.20 M
Oxalic acid is a weak acid and will dissociate 2 hydrogen ions.
- The chemical equation for the first dissociation of oxalic acid follows:
<u>Initial:</u> 0.20
<u>At eqllm:</u> 0.20-x x x
The expression of first equilibrium constant equation follows:
We know that:
Putting values in above equation, we get:
Neglecting the negative value of 'x', because concentration cannot be negative.
So, equilibrium concentration of hydronium ion = x = 0.083 M
- The chemical equation for the second dissociation of oxalic acid:
<u>Initial:</u> 0.083
<u>At eqllm:</u> 0.083-y 0.083+y y
The expression of second equilibrium constant equation follows:
We know that:
Putting values in above equation, we get:
Neglecting the negative value of 'x', because concentration cannot be negative.
So, equilibrium concentration of hydronium ion = y = 0.0000639 M
Total concentration of hydronium ion = [x + y] = [0.083 + 0.0000639] = 0.0830639 M
Hence, the equilibrium concentration of ion is