Another unknown was tested using this procedure. Upon the addition of 6M NH3 and 6M HNO3,...

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Another unknown was tested using this procedure. Upon theaddition of 6M NH3 and 6M HNO3, no precipitate formed. (NH4)2CO3was then added. A precipitate formed and the mixture wascentrifuged and decanted. The liquid was then transferred to asmall beaker and heated to dryness. Once cool, 1M H3PO4 and 1MNa2HPO4 were added to re-dissolve the solid, and the solution wasdivided into two test tubes. To the first, solid KI was added; nochange was observed. To the second, HDMG was added; a redprecipitate formed. The solid from the centrifugation was thendissolved in 6M HCl and Na2SO4 was added. A white precipitateformed. The mixture was centrifuged and decanted. 6M NH3 and(NH4)2C2O4 were added to the liquid. A white precipitate formed.Which cations are present in the unknown?

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Upon the addition of 6M NH3 and 6M HNO3 no precipitate formed No precipitate on addition of 6M NH3 It indicates all compounds which indicates compounds which makes insoluble hydroxide like Al Fe Cr and See Answer

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