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Essay

Rate of Reaction

Essay specific features

 

Issue:

Science

 

Written by:

Anthony W

 

Date added:

October 12, 2012

 

Level:

University

 

Grade:

A

 

No of pages / words:

4 / 890

 

Was viewed:

4758 times

 

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Essay content:

The ionic formula for the reaction is as follows: S2O82- (aq) + 2I- (aq) > 2SO42- (aq) + I2 (aq) However, in order to measure the rates of reaction, sodium thiosulphate and starch are added. Sodium thiosulphate is added to react with a certain amount of iodine as it is made. Without the thiosulphate, the solution would turn blue/black immediately, due to the iodine and starch...
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Without the thiosulphate, the solution would turn blue/black immediately, due to the iodine and starch. The thiosulphate ions allow the rate of reaction to be determined by delaying the reaction so that it is practical to measure the time it takes for the iodine to react with the thiosulphate. After the all the thiosulphate has reacted with the iodine, the free iodine displays a dark blue/black colour with the starch...
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