The Percent Un-Ionized Ammonia in Aqueous Ammonia Solutions at Different <i>p</i>H Levels and Temperatures

Abstract

Previous studies have shown that the un-ionized ammonia molecule and not the ammonium ion is the form of the toxicant harmful to fish. Prior attempts to quantify the amount of un-ionized ammonia in an aqueous solution have been confusing. Data given here provide ready access to the amount of un-ionized ammonia over a range of temperature and pH that is common in temperate freshwater environments.