05 HC) In an experiment, sulfuric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was formed during the...
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(07.05 HC)

In an experiment, sulfuric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was formed during the reaction. A cross drawn at the base of each flask became gradually invisible due the formation of this yellow precipitate. The time taken for the cross to become invisible was recorded. A partial record of the experiment is shown.


Experimental RecordFlaskVolume of

H2SO4Volume of

Sodium ThiosulfateVolume of

WaterTime15 mL50 mL0 mL19 seconds25 mL40 mL10 mL35 mL30 mL20 mL45 mL20 mL30 mL


Based on your knowledge of factors that affect the rates of chemical reactions, predict the trend in the last column of the experimental record. Use complete sentences to explain the trend you predicted. You do not have to determine exact values for time; just describe the trend you would expect (increase or decrease) and why it occurs. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Subject: Chemistry, Science
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