what is the best way to decide if a solution is aqueous, L, gaseous , or solid?
Is there an easy shortcut to finding the oxidation number of a ion?
2007-10-20 06:05:52 · 2 answers · asked by Melissa E 1 in Science & Mathematics ➔ Chemistry
the problem will tell you if its something that you should not automatically know. for instance if the problem says standard temp and press and you are working with oxygen from the air then you should just know that its gaseus O2. water is liquid at that temp and press. hydrogen is almost always H2 gas; if its ever not H2 gas then the problem will either call it liquid or it will say the temp is near absolute zero or something really cold. an ion is almost always in an aqueous liquid form. when an ion is a gas its called a plasma so if the problem involves ions and does not say 'plasma' then its a water based solution. its mostly memorization plus a coup le general rules about temp and pressure. if a problem is talking about the chemical called water and it gives 1 atm of pressure and its temp is minus ten degree then its solid. its ice. check out some phase diagrams for various compounds. theyre all over the web. heres a link to one for water.http://en.wikipedia.org/wiki/Phase_diagrams#Pressure-temperature_diagrams
2007-10-20 06:22:18 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Solutions are always aq!
The oxidation number of an ion is the numerical value of its charge.
2007-10-20 06:13:12 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋