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Reactions of barium hydroxide with ammonium salts are strongly endothermic. The reaction of barium hydroxide octahydrate with ammonium chloride [18] [19] or [20] ammonium thiocyanate [20] [21] is often used as a classroom chemistry demonstration, producing temperatures cold enough to freeze water and enough water to dissolve the resulting mixture.
Water-reactive substances [1] are those that spontaneously undergo a chemical reaction with water, often noted as generating flammable gas. [2] Some are highly reducing in nature. [ 3 ] Notable examples include alkali metals , lithium through caesium , and alkaline earth metals , magnesium through barium .
Barium chlorate solution UN 3406: 5.1: Barium perchlorate solution UN 3407: 5.1: Chlorate and magnesium chloride mixture solution UN 3408: 5.1: Lead perchlorate solution UN 3409: 6.1: Chloronitrobenzenes, liquid UN 3410: 6.1: 4-Chloro-o-toluidine hydrochloride solution UN 3411: 6.1: beta-Naphthylamine solution UN 3412: 8
n.o.s. = not otherwise specified meaning a collective entry to which substances, mixtures, solutions or articles may be assigned if a) they are not mentioned by name in 3.2 Dangerous Goods List AND b) they exhibit chemical, physical and/or dangerous properties corresponding to the Class, classification code, packing group and the name and description of the n.o.s. entry [2]
Fan-favorite seltzer water brands like Topo Chico still contain concerning amounts of PFAS chemicals, despite efforts to minimize the levels. Your Sparkling Water Might Contain Dangerous Chemicals ...
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
The water is expensive, possibly dangerous, and insulting to people struggling for clean, treated water all over the world. So save yourself the $16 and enjoy the clean water we already have ...
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