1.8107 g of steel are dissolved, treated so that Mn present is in the form Mn2+, and diluted to 500. mL. The solution gives a potential of 143.1 mV to a cell with an Mn2+ jon selective electrode. 50.0 mL of the solution is mixed with 20.0 mL of 2.50 x 10-6 M Mn2+ and the potential changes to 187.8 mV. Assume the electrode has an ideal Nernstian slope for Mn2+ at 25 C. How many ug/g of Mn are present in the steel? (ug/g). FM of Mn is 54.938.
1.8107 g of steel are dissolved, treated so that Mn present is in the form Mn2+, and diluted to 500. mL. The solution gives a potential of 143.1 mV to a cell with an Mn2+ jon selective electrode. 50.0 mL of the solution is mixed with 20.0 mL of 2.50 x 10-6 M Mn2+ and the potential changes to 187.8 mV. Assume the electrode has an ideal Nernstian slope for Mn2+ at 25 C. How many ug/g of Mn are present in the steel? (ug/g). FM of Mn is 54.938.
Chapter21: Potentiometry
Section: Chapter Questions
Problem 21.17QAP
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Transcribed Image Text:1.8107 g of steel are dissolved, treated so that Mn present is in the form Mn2+, and diluted to 500. mL. The solution gives a
potential of 143.1 mV to a cell with an Mn2+ jon selective electrode. 50.0 mL of the solution is mixed with 20.0 mL of 2.50 x 10-6 M
Mn2+
and the potential changes to 187.8 mV. Assume the electrode has an ideal Nernstian slope for Mn2+ at 25 C. How many ug/g
of Mn are present in the steel?
(ug/g). FM of Mn is 54.938.
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