A 55.00 mL solution of 0.3900 M AgNO, was added to a solution of Aso " . Ag, AsO, precipitated and was filtered off. Fe* was added and the solution was titrated with 0.2000 M KSCN. After 34.80 mL of KSCN solution was added, the solution turned red. What mass of AsO} was in the original solution? mg AsO- mass:

Fundamentals Of Analytical Chemistry
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Chapter20: Applications Of Oxidation/reduction Titrations
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Problem 20.13QAP
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A 55.00 mL solution of 0.3900 M AgNO, was added to a solution of AsO . Ag, AsO, precipitated and was filtered off.
Fe+ was added and the solution was titrated with 0.2000 M KSCN. After 34.80 ml. of KSCN solution was added, the
solution turned red. What mass of AsO was in the original solution?
mg AsO}-
mass:
A solution contains Al³+ and Co2+. The addition of 0.3527 L of 1.712 M NAOH results in the complete precipitation of the
ions as Al(OH), and Co(OH),. The total mass of the precipitate is 21.71 g. Find the masses of Al* and Co* in the solution.
mass of Al+:
mass of Co2+:
Transcribed Image Text:A 55.00 mL solution of 0.3900 M AgNO, was added to a solution of AsO . Ag, AsO, precipitated and was filtered off. Fe+ was added and the solution was titrated with 0.2000 M KSCN. After 34.80 ml. of KSCN solution was added, the solution turned red. What mass of AsO was in the original solution? mg AsO}- mass: A solution contains Al³+ and Co2+. The addition of 0.3527 L of 1.712 M NAOH results in the complete precipitation of the ions as Al(OH), and Co(OH),. The total mass of the precipitate is 21.71 g. Find the masses of Al* and Co* in the solution. mass of Al+: mass of Co2+:
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