These percentages are on the supposition that the ores are chemically pure; the percentage of metal actually obtained is somewhat less.
Chemically pure glycerine or double distilled glycerine is produced by redistilling "once distilled" glycerine.
Chemically pure is not invariably an accurate gauge of quality.
And our friend, the chemist, would tell us that a chromate of lead composed of some of the above ingredients is not a chemically pure article.
It may not be chemically pure as the chemists would construe the term; but if it responds satisfactorily to a practical test, it is then serving the painter's practical need.
The glycerin, if chemically pure, is not rendered turbid by the fruit ether, which, of course, must also be of the best quality.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "chemically pure" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
