![]() Did you know that Fidel Castro actually owned a bear? A Jewish scientist used aqua regia to hide two solid gold Nobel Prize medallions from the Nazis. Since gold(III) chloride is soluble, the oxidized gold moves into solution, exposing more gold metal to be oxidized. The nitric acid oxidizes the gold to Au 3+, which then pairs with chloride ions from HCl. If you still want to use flash cards, check out the NAG SAG Quizlet.Īqua regia, a mixture of nitric and hydrochloric acids, can actually dissolve gold. No one knew where calcium chloride was at the hardware store. CaCl 2 contains three particles per mole and is very soluble, so it lowers water's melting point a lot.) (Melting/freezing point depression is directly proportional to the number of particles dissolved in a given volume of water. For example, ice melt (calcium chloride) works because it's highly soluble in water, its dissolution is exothermic, and it lowers water's melting point. Note that Castro Bear is still soluble when combined with Group 17 anions.Castro Bear (Ca 2+, Sr 2+, and Ba 2+ are insoluble when combined with the sulfate anion.).PMS (Pb 2+, Mercury(I) ion, and Silver ions are insoluble when combined with sulfate and group 17 anions.).SAG (Sulfates, Ammonium ion, and Group 17 halide ions).NAG (Nitrates, Acetates, Group 1 alkali metal ions). ![]()
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