2. Is it necessary to filter the solution of the dissolved brass sample, but not

Question

2. Is it necessary to filter the solution of the dissolved brass sample, but not the solution of the dissolved copper sample, before you take the respective absorbance readings? Select the number for the answer that best answers the question.

1. It is not necessary to filter the solution of the dissolved brass sample because all of the components that make up the alloy form soluble compounds when they are oxidized.

2. It is necessary to filter the solution of the dissolved brass sample because the alloy may contain other elements that form insoluble compounds, which will interfere with the light as it passes through the solution. Pure copper wire does not contain any such elements.

3. It is necessary to filter the solution of the dissolved brass sample because the copper ions react with other metal ions in solution to form insoluble compounds, which will interfere with the quantitative analysis of copper.

4. It is not necessary to filter the solution of the dissolved brass sample because all of the components that make up the alloy, except for copper, form insoluble compounds when they are oxidized.

Explanation / Answer

The best t answer is 2nd option.

It is necessary to filter the solution of the dissolved brass sample because the alloy may contain other elements that form insoluble compounds, which will interfere with the light as it passes through the solution. Pure copper wire does not contain any such elements.

Actually the brass solution may have substances like solid Tin (iv) oxide in it which will interfere with light as it passes through the solution.

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