A SIMPLE EXPERIMENT IN CHEMICAL KINETICS. 47 



Time. 



& 



0' 



5' 

 10; 

 15' 

 20' 

 25' 

 30' 

 35' 

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 45' 

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 55' 

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 65' 

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 75' 

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 85' 

 90' 

 95' 

 00 



During- the experiment the temperature of the surrounding water 

 did not vary more than three- tenths of a degree (20.°5— 20.°8) and as 

 this affects only the second place of the decimals in the reading of 

 volumes, no correction has been introduced for it. The temperature 

 of the water current passed through the test-tube remained constant 

 at 18.°5. The final volume of air or rather nitrogen was observed 

 after the lapse of 48 hours and gave on proper correction 76.0 c.c. 

 This subtracted from the initial volume gave ^ = 93.5 — 76.0 = 17.5 c.c. 

 for the initial volume of oxygen. 



