The Total solution for NCERT class 6-12
Describe the oxidising action of potassiumdichromate and write the ionic equations for its reaction with
1. iodide
2. iron(ll) solution and
3. H_2S.
Answer
K2Cr2O7 is a powerful oxidisingagent. In dilute sulphuric acid medium the oxidation state of Cr changes from+6 to +3. The oxidising action can be represented as follows :