| http://www.w3.org/ns/prov#value | - This brown color of the solution is attributed to the oxidation of Ag(I) to Ag(II). [0134] The black grayish deposit at the article or in the bulk solution is a consequence of the formation of silver oxy-salts such as Ag7O8X, were X is an anion, depending on the acid used in the method e.g. HNO3 (NO3 ???), H2SO4 (SO4 2???), etc.
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