PMS (Pb 2+, Mercury (I) ion, and Silver ions are insoluble when combined with sulfate. NAG and SAG are always soluble, with PMS and Castro Bear being the exceptions. G: Group 17 elements (the Halogens) = soluble with some compoundsĪll the “PMS” ions are not soluble with group 17 elements or sulfatesĪnd all the “Castro Bear” ions aren’t soluble with sulfates. NAG SAG is an easy way to remember the soluble compounds and the. Four mnemonics that cover most compounds are NAG, SAG, PMS, and Castro Bear. 32 Solubility Rules NAG SAG PMS CastroBar Soluble: Nitrates Acetates Group 1 Exceptions: Sulfates Lead, Mercury, Silver Ammonium Calcium, Strontium. S: Sulfates = soluble with some compounds G: Group 1 elements = soluble with anything Wikihow actually has a really easy way of memorizing the solubility rules with acronyms “NAG SAG”, “PMS”, and “Castro Bear” which stand for the soluble compounds and exceptions to those rules. we're at Ksp and quantitative analysis so it's becoming important again and i could use help refreshing myself! S - Sulfates SO42-> Exceptions: PMS Lead - Pb+2, Mercury - Hg+2, Silver - Ag+ A - Ammonium NH 4 +. Pianissimoe asked: can i ask how you memorize solubility rules? i learned it way back in 121, but didn't really use it for 122 and now that it's the end of the semester, everything's kind of hazy.
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