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Gravimetric Analysis and Nickel Determination Quiz

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Questions and Answers

What is the precipitate formed in the gravimetric analysis of nickel as the dimethylglyoximate complex?

Nickel(II) hydroxide
Bis(dimethylglyoximate) nickel(II) (correct)
Nickel(II) oxide
Nickel(II) sulfate

In what solvent is the dimethylglyoxime supplied?

Water
Ethanol (correct)
Methanol
Acetone

What must be avoided to prevent dissolution of the precipitate in the gravimetric analysis of nickel as the dimethylglyoximate complex?

Large excess of concentrated ammoniacal solutions
Large excess of dimethylglyoxime solution
Both a and b (correct)
Large excess of water

What technique will be used to separate the precipitate in the gravimetric analysis?

<p>Vacuum filtration (A)</p> Signup and view all the answers

What is the main objective of the gravimetric analysis of nickel as the dimethylglyoximate complex?

<p>To determine the % nickel in an unknown nickel salt (D)</p> Signup and view all the answers

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Study Notes

Gravimetric Analysis of Nickel as Dimethylglyoximate Complex

The precipitate formed in the gravimetric analysis of nickel is the dimethylglyoximate complex.

Preparation of Reagents

Dimethylglyoxime is supplied in a methanol solvent.

Precipitation Conditions

To prevent dissolution of the precipitate, it is essential to avoid ammonia and ammonium salts.

Separation Techniques

Filtration will be used to separate the precipitate in the gravimetric analysis.

Analysis Objectives

The main objective of the gravimetric analysis of nickel as the dimethylglyoximate complex is to determine the amount of nickel present in a sample.

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