Which reagent can be used to precipitate Group II cations? After dissolving the

Question

Which reagent can be used to precipitate Group II cations? After dissolving the brown residue in 6M HCl, followed by addition of 0.1M KSCN. A solution with deep red color was obtained. Which is the possible group-III cation present in the brown residue? Is the following statement true or false? A standard NaOH solution can be prapared by dissolving an accurate amount of NaOH into a known volume of aqueous solution. The reaction of (CH2CSNH2) with Cd at pH -0.5 forms a _ Under what condition Group II cations can be precipitated by S?_ The reaction below has an equilibrium constant of 0.0030 at 298K and 1 atm. Which of the following process will lead to the greatest solubility of AgCl? (Assume same amount of each reagent (in volume) is added.)

Explanation / Answer

15-b

16-c

17-a

18-c

19-c

20-a

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