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Electrolytic Refining

What is elect...

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What is electrochemistry?

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Solution

Electrochemistry is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity, which can be generated by movements of electrons from one element to another in a reaction known as an oxidation-reduction ("redox") reaction.

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Q. which is important topic in electrochemistry????????????????????

Q. Consider the table of standard reduction potentials shown below.

Half-reaction	$E^{\circ}$
$C l_{2} + 2 e^{-} \to 2 C l^{-}$	$1.36 V$
$O_{2} + 4 H^{+} + 4 e^{-} \to 2 H_{2} O$	$1.23 V$
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$	$- 0.83$
$R b^{+} + e^{-} \to R b$	$- 2.93 V$

Use the following from the table and your knowledge of electrochemistry to predict the CORRECT net ionic equation for the reaction that will occur when a molten rubidium chloride undergoes electrolysis.

Q. Consider the table of standard reduction potentials shown below.

Half-reaction	$E^{\circ}$
$C l_{2} + 2 e^{-} \to 2 C l^{-}$	$1.36 V$
$O_{2} + 4 H^{+} + 4 e^{-} \to 2 H_{2} O$	$1.23 V$
$2 H_{2} O + 2 e^{-} \to H_{2} + 2 O H^{-}$	$- 0.83 V$
$R b^{+} + e^{-} \to R b$	$- 2.93 V$

Use the information from the table and your knowledge of electrochemistry to predict the CORRECT net ionic equation for the reaction that will occur when an aqueous solution of rubidium chloride undergoes electrolysis.

Q. Read the passage given below and answer the question:
Chemical reactions involve the interactions of atoms and molecules. A large number of atoms/molecules (approximately

6.023 \times 10^{23}

) are present in few grams of any chemical compound varying with their atomic/molecular masses. To handle such large numbers conveniently, the mole concept was introduced. This concept has implications in diverse areas such as analytical chemistry, biochemistry, electrochemistry, and radiochemistry. the following example illustrates a typical case, involving chemical/electrochemical reaction, which requires a clear understanding of the mole concept.
A 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolyzed. This leads to the evolution of chlorine gas at one of the electrodes (atomic mass: Na = 23, Hg = 200; 1 faraday =96500 coulombs).
The total charge (coulombs) required for complete electrolysis is:

Q. Chemical reactions involve interaction of atoms and molecules. A large number of atoms/molecules (approximately

6.023 \times 10^{23}

are present in a few grams of any chemical compound varying with their atomic/molecular masses. To handle such large numbers conveniently, the mole concept was introduced. This concept has implications in diverse areas such as analytical chemistry, biochemistry, electrochemistry, and radiochemistry. The following example illustrates a typical case, involving chemical/electrochemical reaction, which requires a clear under-standing of the mole concept.

A 4.0 M aqueous solution of NaCl is prepared and 500 mL of this solutionn is electrolyzed. This leads to the evolution of chlorine gas at one of the electrodes (atomic mass of Na is 23 and Hg is 200) (1 F = 96500 C).

If the cathode is an Hg electrode, the maximum weight (in g) of amalgam formed from this solution is
(IIT-JEE, 2007)

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