Question

PbO + H2S---> PbS +H20 identify a) Substance oxidized b) oxidizing agent a) Substance reduced b) reducing agent

Answer 1

No substance has gained or lost the electrons. Their oxidation state remains same before and after the reaction.

Explanation:

The reaction is

PbO + H2S---> PbS + H2O

Oxidation sate of Pb = +2

Oxidation sate of O = - 2

Oxidation sate of H = +1

Oxidation sate of S = -2

• Over all the oxidation state of all these substances is neutral.
• There is no change in the oxidation state of any element so overall change is neutral.
• Oxidation is loss of electron and reduction is gain of electron no substance has gained or lost the electrons. Their oxidation state remains same before and after the reaction.