Q12) A solution may contain one or more of the following ions and no other ions: Ag", Cu", Ca", pb²*, Ca²¯ and Fe³". No precipitation was noticed when the solution is treated with 6 M HCl solution. When 0.20 M HC1 is mixed with H,S solution is added, a red solid is formed and removed by filtration. The resultant solution was then treated with NaOH solution and a white precipitate was collected and removed by filtration. Then Small amount of NH3 was added to the solution and no precipitate was formed. If no further tests were made, what possible ions are present in the original solution? (write the ions present in the first blank.. blank) , and write the ions NOT present in the second

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Question 12
Q12)
A solution may contain one or more of the following ions and no other ions:
Ag", Cu, Cd, pb+, Ca?- and Fe No precipitation was noticed when the solution is treated with 6 M
HCI solution. When 0.20 M HCI is mixed with H,S solution is added, a red solid is formed and removed by
filtration. The resultant solution was then treated with NaOH solution and a white precipitate was collected
and removed by filtration. Then Small amount of NH; was added to the solution and no precipitate was
formed. If no further tests were made, what possible ions are present in the original solution?
(write the ions present in the first blank.
blank)
and write the ions NOT present in the second
Transcribed Image Text:Question 12 Q12) A solution may contain one or more of the following ions and no other ions: Ag", Cu, Cd, pb+, Ca?- and Fe No precipitation was noticed when the solution is treated with 6 M HCI solution. When 0.20 M HCI is mixed with H,S solution is added, a red solid is formed and removed by filtration. The resultant solution was then treated with NaOH solution and a white precipitate was collected and removed by filtration. Then Small amount of NH; was added to the solution and no precipitate was formed. If no further tests were made, what possible ions are present in the original solution? (write the ions present in the first blank. blank) and write the ions NOT present in the second
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