To determine: The facts related to chemical properties of the given salts to distinguish them.
Answer to Problem 1DE
Solution: The chemical properties of the given salts are enough to distinguish them.
Explanation of Solution
Given The three salts are named as sodium sulfide, sodium bicarbonate and sodium chloride.
The carbonate salts can be easily distinguished from any other salt by a basic carbonate test. In the test, salt is treated with dilute HCl and release of bubbles of
Thus, sodium carbonate can be distinguished from sodium sulfide and sodium chloride by showing the following reaction:
Sodium chloride salt on reaction with silver nitrate forms sodium nitrate and silver chloride. Here, silver chloride so formed is insoluble in water thus, forms a white curd like solution. The reaction is as follows:
Due to the absence of chlorine in sodium bicarbonate and sodium sulfide, they do not show the above reaction.
Now, sodium sulfide when exposed to moist air, it forms hydrogen sulfide gas that smells like rotten eggs. The
The above reaction is not shown by
Thus, the presence of sodium sulfide is confirmed by the evolution of hydrogen sulfide gas, the sodium bicarbonate is confirmed by the effervescence of carbon dioxide gas and sodium chloride is confirmed by the precipitate of silver chloride.
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Chapter 4 Solutions
MAST F/ CHEM: THE CENTRAL SCI CODE ALON
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