Why is it less desirable to wash AgCl precipitate with aqueous NaNO3 than with HNO3 solution? (Select all that apply.)A) HNO3 evaporates during drying.B)HNO3 is nonvolatile and will lead to a high mass for the precipitate.C )NNO3 is and will lead to a high mass for the precipitate.D)NaNO3 evaporates during drying.

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Asked Sep 10, 2019
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Why is it less desirable to wash AgCl precipitate with aqueous NaNO3 than with HNO3 solution? (Select all that apply.)
A) HNO3 evaporates during drying.
B)HNO3 is nonvolatile and will lead to a high mass for the precipitate.
C )NNO3 is and will lead to a high mass for the precipitate.
D)NaNO3 evaporates during drying.
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Expert Answer

Step 1

We have to choose the correct options why is it less desirable to wash AgCl precipitate with aqueous NaNO3 than with HNO3 solution?

A) HNO3 evaporates during drying.

B) HNO3 is non-volatile and will lead to a high mass for the precipitate.

C) NaNO3 is and will lead to a high mass for the precipitate.

D) NaNO3 evaporates during drying.

Step 2

While choosing the washing solvents, few points are needed to be taken care of –

  1. It should evaporate easily so that during drying of the precipitate, it can be removed easily.
  2. It should not react with the precipitate.
  3. It should not introduce any kind of impurity to the precipitate.
Step 3

Thus, it is preferred to wash the AgCl precipitate by HNO3 rather than NaNO3 because

  • HNO3 is more volatile than NaNO3. Thus upon drying, it evaporates...

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