Since the bivalent metal ions are precipitated by sodium carbonate as carbonates and the trivalent ones as hydroxides, the reagent, obviously, cannot be used to separate the two groups.
The comparative stability of this basic salt represents an instance of the different ionizing power, or basic strength, of the three hydroxide groups of a trivalent base (see p.
The trivalenthydroxides are too weak bases[390] to form stable salts with so weak an acid as carbonic acid.
Those compounds in which the iron is divalent are known as ferrous compounds, while those in which it is trivalent are known as ferric.
Write the general formula of an alum, representing an atom of an alkali metal by X and an atom of a trivalent metal by Y.
Other trivalent sulphates besides aluminium sulphate can form similar compounds with the alkali sulphates, and these compounds are also called alums, though they contain no aluminium.
Since this radical is trivalent and oleic, palmitic, and stearic acids contain only one replaceable hydrogen atom to the molecule, it is evident that three molecules of each acid must enter into each molecule of the ethereal salt.
If a trivalent element combines with a divalent element, the union will be between two atoms of the trivalent element and three of the divalent element, since these numbers are the smallest which have equal valences.
Thus the oxide of the trivalent metal aluminium has the formula Al{2}O{3}.
It can also act as a trivalent metal, and in this condition forms salts similar to those of aluminium.
In like manner, one atom of a trivalent element will replace three of a univalent element, or two atoms will replace three atoms of a divalent element.
Antimony acts as a trivalentelement in the formation of a chloride.
The trivalent metals, which in addition to aluminium include also iron and chromium, are sometimes called the earth metals.
A trivalent atom will combine with three atoms of a univalent element, as in the compound III III H{3}N.
The operation of the valency rule is the most complex of these factors, for there is also to be considered the stabilizing effect of the kations, especially of the trivalent kation Cr+++ from the unhydrolyzed chromium sulphate.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "trivalent" in a variety of sentences. We hope that you will now be able to make sentences using this word.
