If much lead is present, a portion may be precipitated as sulphate, but can be removed by washing with ammonic acetate.
The resulting tungstic acid is dissolved in ammonia, and the ammonic tungstate purified by crystallisation.
The solution of this substance is known as ammonic hydrate or "ammonia."
When this ammonic tungstate is heated in the air, it loses ammonia and water, pure tungstic trioxide being left behind.
The precipitated baric sulphate is digested with a solution of ammonic acetate; and filtered, washed, ignited, and weighed.
The ammonic vanadiate (Roscoes meta vanadiate) is the chief source of the acid.
The solution thus obtained is treated with ammonic chloride in large excess and with some alcohol.
The action of both sodic and ammonic cyanides is precisely similar to that of potassic cyanide.
Fifty parts of ammonic sulphate are required for each part of strontia or lime present.
A weak stream of ammonic cyanide vapour was passed into glass shades, under which pigeons were confined.