CHAPTER VII 

 VELOCITY OF REACTIONS IN LIVING CELLS 



/'"CHEMICAL reactions are very frequently 

 V_x practically completed at the same moment 

 at * which they begin. It is quite impossible to 

 measure the time which elapses from the moment 

 when the reacting substances are brought in 

 contact up to the moment when the end of the 

 reaction is reached. When solutions of nitrate 

 of silver and of sodium chloride are mixed, the 

 two solutions immediately form the well-known 

 white, flaky precipitate, and, provided that there 

 is enough nitrate of silver present, all the chlorine 

 is deposited in the form of insoluble silver salt. 

 Most reactions used in analytic Chemistry are 

 reactions of enormously great velocity. We 

 comprehend, therefore, why chemists did not turn 

 their attention to the laws of Reaction Velocity 

 till in the last decades, when organic synthesis 

 continually taught that there are many chemical 

 reactions which require a considerable length of 

 time before being ended. 



Most reactions in Inorganic Chemistry take 

 place between electrolytes substances which are 

 good conductors of electric currents. Many 

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