21. Nuclear Chemistry - Part 3 of 3
21. Nuclear Chemistry / Rate of Radioactive Decay / Problem 1
A laboratory student prepared a 0.00155 M KBr solution with a small amount of radioactive 77Br (t1/2 = 57.04 h). She recorded the activity of the solution as 0.127 mCi/mL. She used 25.0 mL of this solution to precipitate an unknown metal Y as YBr. She mixed the KBr solution with 25.0 mL of 0.00234 M YNO3 solution. She removed the precipitate by filtration and the activity of the obtained filtrate after 5 hours was 0.0156 mCi/mL. Calculate the molar concentration of Y+, Br−, and the solubility product of YBr.
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