Silver ion is being considered as a reagent for separating I from SCN¯ in a solution that is 0.060 M in KI and 0.070 M in NaSCN. Given that the Ksps are 8.3 x 10-17 for AgI and 1.1 x 10-12 for AgSCN, answer the following. a) What Ag* concentration is needed to reduce the I- concentration to 6.0 x 10-6 M (i.e., remove 99.99% from solution)? b) What is the Ag* concentration when AgSCN begins to precipitate? c) What is the ratio of [SCN¯] to [I] when the AgSCN begins to precipitate? d) Can Ag* effectively be used to separate I and SCN- from solution? (Yes or no?) Explain your choice.

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3. Silver ion is being considered as a reagent for separating I from SCN¯ in a solution that is 0.060 M in
KI and 0.070 M in NaSCN. Given that the Ksps are 8.3 x 10-17 for AgI and 1.1 x 10-12 for AgSCN,
answer the following.
a) What Ag* concentration is needed to reduce the I- concentration to 6.0 x 10-6 M (i.e., remove
99.99% from solution)?
b) What is the Ag* concentration when AgSCN begins to precipitate?
c) What is the ratio of [SCN¯] to [I]when the AgSCN begins to precipitate?
d) Can Agt effectively be used to separate I and SCN- from solution? (Yes or no?) Explain your
choice.
Transcribed Image Text:3. Silver ion is being considered as a reagent for separating I from SCN¯ in a solution that is 0.060 M in KI and 0.070 M in NaSCN. Given that the Ksps are 8.3 x 10-17 for AgI and 1.1 x 10-12 for AgSCN, answer the following. a) What Ag* concentration is needed to reduce the I- concentration to 6.0 x 10-6 M (i.e., remove 99.99% from solution)? b) What is the Ag* concentration when AgSCN begins to precipitate? c) What is the ratio of [SCN¯] to [I]when the AgSCN begins to precipitate? d) Can Agt effectively be used to separate I and SCN- from solution? (Yes or no?) Explain your choice.
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