=. 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 Sengoku was a century-long period of political upheaval and warlordism in Japan, lasting from the Onin War of 1467-77 through the reunification of the country around 1598. It was a lawless era of civil war, in which the feudal lords of Japan fought one another in endless plays for land and power. Although the political entities that were fighting were actually just domains, the Sengoku is sometimes referred to as Japan's Warring States Period.