LEAD NITRATE 



Lead nitrate is made from litharge, PbO, 

 and nitric acid. 



Calculation. — From the equation, 



PbO + 2HNO3 = Pb(N03).2 + H2O, 



calculate the amount of nitric acid required 

 to act on 20 grams of lead oxid. Read the 

 spindle floating in the nitric acid to be used 

 and, by reference to the table at the end of 

 this exercise, ascertain how many grams of 

 actual nitric acid in one cubic centimeter of 

 this liquid. By division find out how many 

 cubic centimeters of this nitric acid must 

 be used. 



Enter the results in the following form: 



Nitric acid required, grams, 



Density of nitric acid solution, 



Number grams nitric acid in 1 cc, 



Volume of nitric acid solution, required, cc, 



Procedure. — Weigh out 20 grams of 

 litharge, and place it in a small beaker with 

 the required amount of nitric acid. Heat 

 until the oxid is converted to nitrate and 

 solution results, adding more water, if neces- 

 sary, to dissolv the crystals of lead nitrate. 



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