Consider a solution containing the following cations: Na+, Hg2+, ...

[cagreen833]

Consider a solution containing the following cations: Na⁺, Hg²⁺, Mn²⁺, Al³⁺ and Ag⁺. Treatment of the solution with dilute HCl followed by saturation with H₂S results in formation of precipitate(s). Which ions still remain in solution (i.e., did not precipitate)?
   
  a.
  Ag⁺ only
   
  b.
  Na⁺, Hg²⁺, Al³⁺
   
  c.
  Ag⁺ and Hg²⁺
   
  d.
  Na⁺, Al³⁺, and Mn²⁺
   
  e.
  Na⁺ only

Question 2

In the classic scheme for qualitative analysis, the cations of Analytical Group IV are precipitated as phosphates or carbonates. Analytical Group IV consists of
   
  a.
  alkali metals
   
  b.
  alkaline earth elements
   
  c.
  the halogens
   
  d.
  transition metals having +2 ions
   
  e.
  none of these

Question 3

When a mixture containing cations of Analytical Groups IIII is treated with H₂S in acidic solution, which cations are expected to precipitate?
   
  a.
  Analytical Group I only
   
  b.
  Analytical Group II only
   
  c.
  Analytical Group III only
   
  d.
  Analytical Groups I and II
   
  e.
  Analytical Groups II and III

[ryhom]

Answer to Question 1

d

Answer to Question 2

b

Answer to Question 3

d

[cagreen833]

Thanks

[ryhom]

Welcome