Answer / Neeraj Trivedi

Iron ores are naturally occurring mineral resources containing significant amounts of iron. The primary forms of iron ore are Hematite (Fe2O3) and Magnetite (Fe3O4). Additionally, limonite and siderite are also important types of iron ores.

What is positive testing in relation to chemistry? For example, the sentence reads "Sample solutions are solutions known to contain one of each of the following ions, silver ion, Ag+(aq), barium ion, Ba2+(aq), and iron (III) ion, Fe3+(aq). Testing solutions are the solutions containing a polyatomic ion that can react with one of the metal ions to give a positive test." I am then asked to define what a "positive test" is. I am currently a student who is pretty new to chemistry, please try and make your answer as simply as possible. Thanks for the help.

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