Back titration can be a powerful tool for the indirect determination of analytes. The determination of total protein using the Kjeldahlmethod is an example of such a back titration method. is another. Describe the procedure used for Kjeldahldeterminations of total protein. Discuss the advantages and disadvantages pertaining to this procedure. Discuss the impact of back titration and the contribution of titration error to the final results.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds