18 WATER 



9. Discuss the advisability of drinking liberal quantities of water at meal time. 



10. Write an equation for the reaction between soap and hard water. 



11. Write an equation for the softening of water by zeolites (silicates). 



12. Explain the terais (1) temporaiy and (2) permanent hardness of water. 



13. Define the term ion exchange resin. Find the name of one resin other than 

 those given in the text and the name of the company that produces it. 



14. Write equations for the removal of MgCla from water by ion exchange resin. 



REFERENCES AND SUGGESTED READINGS 



Adolph, E. F., "The Metabolism and Distribution of Water in Body Tissues," 



Physiol. Rev., 13, 336 (1933). 

 Gortner, R. A., Outlines oj Biochemistry , 3rd ed., John Wiley and Sons, Inc., New 



York, 1949. 

 Hawk, P. B., Oser, B. L., and Summerson, W. H., Practical Physiological Chemistry, 



12th ed., P. Blakiston's Son and Company, Inc., Philadelphia, 1947. 

 Kunin, R. and Myers, R. J., Ion Exchange Resins, John Wiley and Sons, Inc., New 



York, 1951. 

 Mason, W. P. and Buswell, A. M.. Examination oj Water, John Wiley and Sons, 



Inc., New York, 1931. 

 Moulton, C. R., "Age and Chemical Development in Mammals," J . Biol. Chem., 



57, 79 (1923). 

 Nachod, F. C, Ion Exchange Theory and Application, Academic Press, Inc., New 



York, 1949. 

 Penfield, W. and Gushing, R. E., "Bathing the Green Goddess, Purification of 



Chlorine," J. Ind. Eng. Chem., 31, 377 (1939). 

 Thresh, J. C, Beale, J. F., and Suckling, E. V., The Examination oj Water and 



Water Supplies, P. Blakiston's Son and Company, Inc., Philadelphia, 1933. 



