Translations:Potassium/37/en

Reagents used to precipitate potassium salts include sodium tetraphenylborate, hexachloroplatinic acid, and sodium cobaltinitrite into respectively potassium tetraphenylborate, potassium hexachloroplatinate, and potassium cobaltinitrite. The reaction with sodium cobaltinitrite is illustrative:

3 K+
+ Na
3[Co(NO
2)
6] → K
3[Co(NO
2)
6] + 3 Na+

The potassium cobaltinitrite is obtained as a yellow solid.