31. When dissolved in nitric acid or potassium hydroxide , tungstic acid forms and helium escapes in bubbles. 32. It acts in similar fashion to the compounds rubidium hydroxide and potassium hydroxide , although more reactive. 33. Dithizone may be prepared by reacting phenylhydrazine with carbon disulfide, followed by reaction with potassium hydroxide . 34. Later that year, Lecoq obtained the free metal by electrolysis of the hydroxide in potassium hydroxide solution. 35. It can also be prepared by the elimination of hydrogen bromide from bromostyrene using molten potassium hydroxide . 36. Diisopropylamine can be dried by distillation from potassium hydroxide ( KOH ) or drying over sodium wire. 37. Another common alkali hydroxide is potassium hydroxide . 38. It can be either bar soap made with sodium hydroxide or liquid soap made with potassium hydroxide . 39. The surface of the cap will stain yellow if a drop of dilute potassium hydroxide is applied. 40. Potassium hydroxide is poisonous and highly corrosive.
