=. 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 Northern and Southern dynasties was a period in the history of China that lasted from 420 to 589, following the tumultuous era of the Sixteen Kingdoms and the Wu Hu states. It is sometimes considered as the latter part of a longer period known as the Six Dynasties. Though an age of civil war and political chaos, it was also a time of flourishing arts and culture, advancement in technology, and the spread of Mahayana Buddhism and Daoism. The period saw large-scale migration of Han Chinese to