A Solution Is Prepared from an Unknown Solid Containing Ni

question 6

Short Answer

A solution is prepared from an unknown solid containing Ni and Cu by dissolving 5.2832 grams of the solid in nitric acid to release Ni²⁺ and Cu²⁺.The nitric acid is neutralized and the solution diluted to 200.0 mL.Next excess sodium carbonate is added to the solution to form Ni and Cu carbonates with a total mass of 2.5305 grams.The precipitate is then ignited to form NiO and CuO with a total mass of 1.6126 grams.What is the percent by mass Ni and Cu in the solid sample?

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