to gravimetrically analyze the silver content of a piece of jewelry made from an

Question

to gravimetrically analyze the silver content of a piece of jewelry made from an ally of ag and cu a student dissolves a small preweighed sample in hno3. ag+ (aq) and cu2+(aq) ions form in the solution. which of the following should be the next step in the analytical process?

A. centrifuging the solution to isolate the heavier ion

B. evaporating the solution to recover the dissolved nitrates

C. adding enough base solution to bring the ph up to 7

D. adding a solution containing an anion that forms an insoluble salt with only one of the metal ions

Explanation / Answer

Solution :-

In the first step the metal alloy was dissoled with the HNO3

To find the amount of the each metal in the alloy we need to separate the both metal ions from one another and determine the mass of the each metal in the alloy

Therefore the next step in the analyticla process is the

D. adding a solution containing an anion that forms an insoluble salt with only one of the metal ions

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