It is an indigo-blue powder, soluble in hydrochloric acid, but insoluble in dilute nitric and sulphuric acids.
The insoluble salts are rose-red or violet in colour.
It is readily soluble in water and alcohol, but insoluble in ether.
Fusion with caustic potash converts it into a mixture of potassium ruthenate and ruthenium sesquioxide, Ru 2 0 3, which is a black, almost insoluble powder.
It is insoluble in water, but gradually decomposes, forming a hydrated oxide, Ru 2 0 5 H 2 O.
The insoluble residue contains a mixture of two sulphides, one of which is converted into the sulphate by nitric acid, whilst the other (a crystalline solid) is insoluble in acids.
But if there be no tendency to form an insoluble compound, or one which is not liable to react upon any of the other substances present, this is no longer the case.
Arsenic is insoluble in the acid, but immediately dissolves in the bleaching-powder.
Certain substances are insoluble in all these reagents, and other methods, such as the fusion with sodium carbonate and potassium nitrate, and subsequent treatment with an acid, must be employed.
If barium is present, the solution of the carbonates in hydrochloric acid is evaporated and digested with strong alcohol for some time; barium chloride, which is nearly insoluble in alcohol,is thus separated, the remainder being precipitated by a few drops of hydrofluosilicic acid, and may be confirmed by the ordinary tests.
When boiled with calcium chloride and ammonia, salicylic acid gives a precipitate of insoluble basic calcium salicylate, C 6 H 4 ‹ 0 2 i Ca, a reaction which serves to distinguish it from the isomeric metaand para-hydroxybenzoic acids.
The calcium salt, CaN 2 O 2.4H 2 O, formed by the action of calcium chloride on the silver salt in the presence of a small quantity of nitric acid, is a lustrous crystalline powder, almost insoluble in water but readily soluble in dilute acids.
It is a reddish-yellow crystalline solid, insoluble in water and melting at 178° C. It explodes readily when melted or subjected to shock.
It crystallizes in colourless plates melting at 20°C. and boiling at 202°C.; it is insoluble in water, but readily dissolves in the ordinary organic solvents.
They are usually insoluble in water, alcohol and ether; and their presence as solutes in vegetable and animal fluids is not yet perfectly understood, but it is probably to be connected with the presence of salts or other substances.
It is insoluble in water, while its salts are readily soluble.
I see how human ingenuity and new technologies have eliminated previously insoluble problems once we stand back and let free markets do what they do best: direct the allocation of capital to find a solution.
It was too dreadful to be under the burden of these insoluble problems, so he abandoned himself to any distraction in order to forget them.
In the morning, on an empty stomach, all the old questions appeared as insoluble and terrible as ever, and Pierre hastily picked up a book, and if anyone came to see him he was glad.
She was tormented by the insoluble question whether she loved Anatole or Prince Andrew.
Yet one need only discard the study of the reports and general plans and consider the movement of those hundreds of thousands of men who took a direct part in the events, and all the questions that seemed insoluble easily and simply receive an immediate and certain solution.