One test tube contains distilled water, and the other contains a potassium chloride solution.

| September 18, 2021 | education

One test tube contains distilled water, and the other contains a potassium chloride solution. Find out which test tube in which test tube each of the substances given to you is located.

In order to determine which of the two test tubes contains a solution of potassium chloride salt, it is necessary to carry out a qualitative reaction for the chloride ion. To do this, add a solution of silver nitrate to both test tubes. In the test tube with distilled water, nothing noticeable will happen, and in the test tube with potassium chloride, a white curdled precipitate of silver chloride will fall out. This reaction can be written as an equation:

KCl + AgNO3 = AgCl + KNO3

It makes no sense to carry out a qualitative reaction to distilled water, because by elimination, we determined which test tube it was in.



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