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C6.4 Electrolysis of aqueous solution

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Total cards: 8•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (8)

#1
Front (Question)

What is brine?

Back (Answer)

Concentrated sodium chloride solution

#2
Front (Question)

What are the products when brine is electrolyzed?

Back (Answer)

Chlorine Hydrogen Sodium hydroxide solution

#3
Front (Question)

What happens at the anode of the electrolysis of brine?

Back (Answer)

Cl- ions and OH- are both attracted to the anode Since a halide ion is present this means chlorine is produced at the anode

#4
Front (Question)

What is the half equation at the anode of the electrolysis of brine?

Back (Answer)

2Cl- → Cl(2) molecule + 2e-

#5
Front (Question)

What happens at the cathode of the electrolysis of brine?

Back (Answer)

H+ ions and Na+ ions are attracted to the cathode Sodium is more reactive than hydrogen so hydrogen is formed at the cathode

#6
Front (Question)

What is the half equation at the cathode of the electrolysis of brine?

Back (Answer)

2+H + 2e- → H(2) molecule

#7
Front (Question)

What is the remaining solution after the completed electrolysis of brine?

Back (Answer)

Sodium hydroxide

#8
Front (Question)

How can you test for the NaOH solution?

Back (Answer)

Add a Ph indicator It will be blue or purple if the solutions contains a base