=. soluble. ammonium phosphate, (NH 4) 3 PO 4, is soluble. +. any other cation. =. low solubility (insoluble). magnesium carbonate, MgCO 3, is insoluble. 1  All compounds of the ammonium ion (NH 4 +), and of Alkali metal (Group IA) cations, are soluble. 2  All nitrates and acetates (ethanoates) are soluble. 3  All chlorides, bromides and iodides are soluble EXCEPT those of silver, lead and mercury(I).
The period of the Warring States (Zhanguo or Chan-Kuo) refers to the era of about 475 BCE to 221 BCE. It commenced at a time of when the numerous petty city-state kingdoms of the Spring and Autumn period had been consolidated into seven major contenders and a few minor enclaves. The above map shows a delineation of the states.
The Spring and Autumn period was initiated by the eastward flight of the Zhou court. 1  There is no one single incident or starting point for the Warring States era.