Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Convection in a liquid Convection in a liquid can be seen by putting a crystal of potassium permanganate in a beaker of water and gently heating it with a Bunsen flame. Air current close to a ...

The ordinary macro-Kjeldahl method was much improved in speed and reliability by using a mixed selenium–mercury catalyst with the usual potassium sulphate; but even in this case some doubt ...

Add 10 to 15 drops of glycerol to the depression in the center of a pile of finely ground potassium permanganate in an evaporating dish on a heat proof surface. Stand back! Within a few seconds, the ...

This process is sped up by a catalyst. In this reaction, the catalyst is potassium permanganate, and the bubbles are full of oxygen gas. Hydrogen peroxide decomposes on its own into water and oxygen ...