Potassium Nitrate 25 



QUESTIONS 

 (To be answerd in the notebook.) 



1. How many grams of potassimn chlorid are 

 required to miite with 100 grams of sodium nitrate? 

 Keep one decimal place in the figure. 



2. Of what use is potassium nitrate? 



3. Write the symbols of the four salts that exist 

 in solution at the begiiming of this experiment. Write 

 symbols for the ions. 



4. W^hat is the solubility of potassium nitrate at 

 100°? of sodium chlorid? 



5. What is the solubility of these two salts at room 

 temperature or the temperature of hydrant water? 

 State the exact temperature selected. 



6. Describe a test for chlorid ions. 



7. Describe the crystals of potassium nitrate; of 

 sodium chlorid. 



8. When might it be desirable to use potassium 

 nitrate as a fertilizer? 



9. Where is sodium nitrate found? What is its 

 common name? Why is it not used for making gun 

 powder? 



10. If one kilo of a solution of salt saturated at 100^ 

 is coold to 10° how many grams of salt will separate 

 out? Consult the rrafs in one of the references given 

 in the last paragraf before the question. 



