DAIRY LABORATORY GUIDE 



39 



5. Add N/10 silver nitrate solution from a burette drop 

 by drop until a permanent brownish color remains. 



6. Read the number of c. c. of the silver nitrate solution 

 used and determine the percentage of salt in the butter. 

 With an N/10 solution, each c. c. is equivalent to one per 

 cent of salt, which gives directly the percentage of salt in the 

 sample. 



Data: 



Application: 1. What percentage of salt does the aver- 

 age butter market demand? 



2. Is all butter salted? 



3. In what way is salt beneficial to butter? 



4. Why is it necessary to keep the silver nitrate in a 

 brown glass-stoppered bottle? 



Student's Notes: 



