An aqueous potassium iodate stock solution is made by dissolving 6 11 mol KIO, in sufficient water for the final volume of the solution to be 4.50 L. Calculate the molarity of the stock KIO, solution molarity of stock KIO, solution 1.36 M A 10,0 ml aliquot is removed from the described stock solution and diluted to a total volume of 100.0 ml, Calculate the molarity of the dilute solution M 5 molarity of dilute KIO, solution=

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answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol