Potassium manganate: Difference between revisions
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{{Compound|chemf=K2MnO4|aka=potassium ( | {{Compound|chemf=K2MnO4|aka=potassium (VI) manganate | ||
|mm=197.132|density=2.78|mp=190(decomp)|bp=|sol_aq=decomp | |mm=197.132|density=2.78|mp=190(decomp)|bp=|sol_aq=decomp | ||
|stp_p=|stp_q= | |stp_p=crystals|stp_q=dark green | ||
|nfpa_h=1|nfpa_r=1|nfpa_o=OX | |nfpa_h=1|nfpa_r=1|nfpa_o=OX | ||
}} | }} | ||
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==Character== | ==Character== | ||
==Production== | ==Production== | ||
===Synthesis=== | ===Synthesis=== | ||
#roast a mixture of [[potassium hydroxide]] and [[manganese dioxide]] in [[air]] giving [[potassium manganate]] | #roast a mixture of [[potassium hydroxide]] and [[manganese dioxide]] in [[air]] giving [[potassium manganate]] | ||
Latest revision as of 03:53, 30 November 2023
| Chemical formula | K2MnO4 |
|---|---|
| OTP appearance | dark green crystals |
| Molar Mass(g/mol) | 197.132 |
| Density(g/cc) | 2.78 |
| Melting Point(°C) | 190(decomp) |
| Solubility in water(g/L) | decomp |
| NFPA 704 |  0
1
1
OX
|
Uses
Other
- Precursor to potassium permanganate
Natural occurrence
Does not occur naturally
Hazards
Character
Production
Synthesis
- roast a mixture of potassium hydroxide and manganese dioxide in air giving potassium manganate
- 2 MnO2 + 4 KOH + O2 → 2 K2MnO4 + 2 H2O