using aqueous sulphuric acid as one reactant write equations for a redox reaction

Expert Answers

An illustration of the letter 'A' in a speech bubbles

sulphuric acid is very much widley used in chemical reactions as an strong acid, but it is also used an strong oxidizer. Sulphuric acid demosntrates high magnitude of oxidizing potential. This due to the sulphur present in the molecule. In sulphuric or in sulphate, the oxidation number of sulphur is +6, which is the hoghest sulphur can achieve. Therefore it can oxidize other materials while reducing its oxidation state.

There are a lot of well known redox reactions where sulphuric acid is involved. One such reaction is,

C + 2 H2SO4 → CO2 + 2 SO2 + 2 H2O

Here Carbon is oxidized into CO2 (Its oxidation number changes from 0 to +4) while H2SO4 is converted to SO2 (Its oxidation number reduces from +6 to +4)

Similarly, it reacts with elemental sulphur also.

S + 2 H2SO4 → 3 SO2 + 2 H2O

Example redox reaction:

Reacton with halide ions (Br-)

Oxidation reaction:

2Br- ------> Br2 + 2e

Reduction reaction:

H2SO4 + 2H+  + 2e ------> SO2 + 2H2O

See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Posted on