The standard free energy change for a reaction in an electrolytic cell is always:_________
1 answer:
Answer: The standard free energy change for a reaction in an electrolytic cell is always positive.
Explanation:
Electrolytic cells use electric currents to drive a non-spontaneous reaction forward.
Relation of standard free energy change and emf of cell
where,
= standard free energy change
n= no of electrons gained or lost
F= faraday's constant
= standard emf
= standard emf = -ve , for non spontaneous reaction
Thus
Thus standard free energy change for a reaction in an electrolytic cell is always positive.
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Approximately .
Explanation:
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<h3>Formula mass of strontium hydroxide</h3>Look up the relative atomic mass of ,
, and
on a modern periodic table. Keep at least four significant figures in each of these atomic mass data.
:
.
:
.
:
.
Calculate the formula mass of :
.
means that each mole of
formula units have a mass of
.
The question states that there are of
in this solution.
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.
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solution. Convert the unit of volume to liter:
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The molarity of a solution measures its molar concentration. For this solution:
.
(Rounded to four significant figures.)