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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Definitions:

Auditory Stimulus

A sensory input related to hearing, such as sounds or noises, that can elicit a response from an organism.

Facial Expression

The use of the facial muscles to convey emotion, information, or reactions.

Eyelids Lifted

The action of raising the upper eyelids, usually to widen the eyes, associated with increased alertness or surprise.

Mouth Corners

The outer points of the mouth where the upper and lower lips meet.