ms/mod/ibis/view.php?id-1566133 Spring15 . PAPPAS Actities abis) and Due Dates H
ID: 815785 • Letter: M
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ms/mod/ibis/view.php?id-1566133 Spring15 . PAPPAS Actities abis) and Due Dates HW 17b 015 1 155 PM O 91.5/1003/24/2015 04:52 PM 8 Gra Print ilCalculator-Periodic Table n 16 of 16 Map A solution containing a mixture of metal cations was treated with dilute HCI and no precipitate formed Next, H2S was bubbled through the acidic solution. A precipitate formed and was filtered off. Then, the pH was raised to about 8 and H2S was again bubbled through the solution. A precipitate again formed and was filtered off. Finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. Which metal ions were definitely present, which were definitely absent, and which may or may not have been present in the orginal mxture? Definitely present Definitely absent Ag Ba2 Co? Mg2 Possibly present Cu2* Sn*. Hg.2 Zn Fe There is a hint availabliel View the hint by dlicking on the Owider br agsin to hide the hint Close Solution Check Answer Net E ViewSonicExplanation / Answer
Since the solution is treated with dil. HCl, H2S in acidic medium, H2S in basic medium and then with sodium carbonate we can definitely say abut the presence/absence of first, second, fourth and fifth group cations of qualitative ananlysis.
Definitely absent ions are
Ag+, Pb+2, Ba+2 ,Ca+2 and Sr+2
Ions that are possibly present
Cu+2, Sn+4Hg+2, Co+2,Zn+2(used the ions given in list only)
Ions may/ may not be present
Fe+2,,K+, , Mg+2
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