Question

Give the products obtained at platinum electrodes of aq.k2so4 during electrolysis

Answer 1

We have over 30 years technical experience on platinum coated titanium anodes. Lifetime Warranty. Materials: Gr1 Titanium. Anode Experts. Request for Quote. Custom Design.

Answer 2

The products obtained at platinum electrodes of aq. $K_{2}SO_{4}$ during electrolysis are oxygen and hydrogen.

What happens in Electrolysis?

• In electrolysis, ionic products (in the electrolyte) are broken down into their constituent ions when electric current is passed through them.
• The cationic part of the electrolyte goes to Cathode to get reduced.

• The anionic part of the electrolyte goes to Anode to get oxidized.

Components of aqueous $K_{2}SO_{4}$ :

• $K^{+}$ cation and $SO_{4}^{-2}$ anion
• $H^{+}$ and $OH^{-}$ ion due to water component

Reaction at anode:

$H_{2}O$ is much easier to oxidize than $SO_{4}^{-2}$. So

$2H_{2}O \rightarrow O_{2} + 4H^{+} + 2e^{-}$

Product at anode is oxygen gas.

Reaction at cathode:

$H_{2}O$ much easier to reduce than $K^{+}$. So

$H_{2}O + 2e^{-} \rightarrow H_{2} + OH^{-}$

Product at cathode is Hydrogen gas.

So, the products obtained at platinum electrodes of aq. $K_{2}SO_{4}$ during electrolysis are oxygen and hydrogen.