HYDROCHLORIC ACID, CHLORIN, AND CHLORIDS 85 



91. Chlorids. Combined with the metals, chlorin forms 

 chlorids. As a class, the chlorids are quite stable com- 

 pounds, inasmuch as chlorin has strong affinity for nearly 

 all of the metals. The properties of the different chlorids 

 vary with the metal with which the chlorin is combined. 

 The chlorids do not take such a direct part in plant as in 

 animal nutrition. When present in either soil or water 

 in any appreciable amount, the soil is sterile and the 

 water is not suitable for either drinking or irrigation 

 purposes. Sodium chlorid is found in nature most 

 abundantly of any of the chlorids. 



Problem /. How much H 2 SO 4 is required to combine with 2000 

 pounds NaCl in making HC1 ? 



Problem 2. How much HC1 can be made from 2000 pounds of 

 NaCl? 



Problem j. How much Na^jSOt is produced when 2000 pounds 

 NaCl are used for making HC1 ? 



