At all events, it is quite true that all traces of potassa are washed out with the solution of carbonate of sodium.
If mixed with nitre, the potassa retains the carbonic acid, and the carbon may be thus easily estimated.
The quantity of potassa present in the manure can be calculated from the weight of platinum obtained.
The seeds of hemlock, or their alcoholic extracts, is distilled with water and potassa.
Magenta is completely decolorized by potassa, but a prolonged washing in water reproduces the original shade.
