When pure it is attracted by the magnet, and is entirely soluble in hydrochloric acid; and ammonia added to the solution throws down a black precipitate.
When pure beeswax (bleached) is digested in boiling alcohol for some time, a solution of myricin and cerin is formed.
For this reason, when pure zinc is used in the preparation of hydrogen a few drops of platinum chloride are often added to the solution to assist the chemical action.
This fine melon originated in Clarendon County, South Carolina; and, when pure, may at all times be readily recognized by the peculiarly characteristic markings of the seeds.
They are, however, quite distinct, and, when pure, very beautiful.
This is an old variety, and, when pure, still stands in high estimation; having a head nearly as large and as white as a cauliflower.
When pure it affords a very valuable means of adjusting the scale of high-ranged thermometers.
This chromate has a fine cinnabar red, when pure; and, at a dull red heat, parts with a portion of its oxygen and its mercurial oxide.
When pure, it occurs in the gaseous state, but it combines with water like the hydrochloric or muriatic acid gas into a liquid acid.
The earths, when pure, are all white substances, not very heavy, and having scarcely any of the properties of the metals from which they are derived.
When pure, it is pearly white, insoluble in boiling water, but soluble in cold water and in vinegar.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "when pure" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.