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Question

Brine solution on electrolysis will give:
  1. NaOH
  2. Cl2
  3. O2
  4. H2

A
NaOH
B
Cl2
C
H2
D
O2
Solution
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Brine is a solution of sodium chloride (NaCl) and water (H2O). The electrolysis of brine is a large-scale process used to manufacture chlorine from salt. Two other useful chemicals are obtained during the process, sodium hydroxide (NaOH) and hydrogen (H2). The chlorine and sodium hydroxide produced in the process must be separated they react when they come into contact with each other.

The negative cathode electrode reaction for the electrolysis of brine (sodium chloride solution):

The negative cathode attracts the Na+ (from sodium chloride) and H+ ions
(from water). Only the hydrogen ions are discharged at the cathode. The more reactive a metal, the less readily its ion is reduced on the electrode surface.
The hydrogen ions are reduced by electron (e) gain to form hydrogen molecules at the negative electrode which attracts positive ions.

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Brine solution on electrolysis will give:
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Brine solution on electrolysis will not give__________.
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Q3
What products are formed during, the electrolysis of a concentrated aqueous solution of NaCl?
(I) Cl2
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(III) H2(g)

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Name the product formed when Cl2 and H2 produced during the electrolysis of brine are made to combine.
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Q5
Consider the following reactions:
I. 2Na+2H2O2NaOH+H2
II. 2NaOH+Cl2NaCl+NaOCl+H2O
III. 4OHO2+2H2O+4e
IV. 2ClCl2+2e
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