CBSE Class 12-science Answered
Please answer fast.
Write the equations involved in the presentation of KMnO4 from Pyrolusite ore
Asked by varma.renu9481 | 01 Mar, 2023, 12:09: PM
Expert Answer
Dear Student,
The correct question is:
Write the equations involved in the preparation of KMnO4 from Pyrolusite ore.
It is prepared from the mineral, pyrolusite, MnO2, for large scale preparation.
The preparation involves following steps;
(a) Conversion of MnO2 into potassium manganate:
The finely crushed pyrolusite mineral is fused with potassium hydroxide in presence of air or oxidizing agent such as potassium nitrate. The green coloured potassium manganate is formed.
2MnO2 + 4KOH + O2 → 2K2MnO4 + 2H2O
2MnO2 + 2K2CO3 + O2 → 2K2MnO4 + 2CO2
MnO2 + 2KOH + KNO3 → K2MnO4 + KNO2 + H2O
3MnO2 + 6KOH + KClO3 → 3K2MnO4 + KCl + 3H2O
If this solution is allowed to stand for some time, potassium manganate is then undergoes disproportionation in the neutral or acidic solution.
Answered by | 01 Mar, 2023, 01:00: PM
Application Videos
Concept Videos
CBSE 12-science - Chemistry
Asked by hannamaryphilip | 17 Apr, 2024, 11:20: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by ukg8612 | 15 Apr, 2024, 07:36: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by sameerteli003 | 08 Apr, 2024, 11:48: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by navadeepnavadeep242 | 19 Mar, 2024, 08:56: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by kavitabawane190 | 08 Mar, 2024, 05:24: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by hanihope27 | 01 Mar, 2024, 08:33: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by rashmij34 | 27 Feb, 2024, 04:42: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by anubhutiupadhaya | 27 Feb, 2024, 04:28: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by sagarmishra | 27 Feb, 2024, 04:01: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Asked by yashwanthgowdakn4 | 22 Feb, 2024, 09:14: PM
ANSWERED BY EXPERT