Consider the following separation scheme with a solution containing Ag+, Ba2+, F

Question

Consider the following separation scheme with a solution containing Ag+, Ba2+, Fe3+ and Ni2+. 3. Consider the following separation scheme. Fill in all blanks and answer the question below. e, f a. b. d. Hint: a/b and cld are interchangeable; in other words you could do either of these two steps first.) e. g· (Hint: These later steps usually involve complex ion formation.) Hint: Look for a cation that does not form as many complex ions.) h. j. (Hint: J is a confirmatory test.) ??? ?? At one the point in the above scheme both iron(II) and nickel(lI) co-exist in solution and can be separated using 15 M ammonia. Upon initial addition of this reagent the hydroxide of each cation forms; write the equation showing this formation. Continued addition of ammonia causes one of the hydroxides to dissolve. Identify the complex ion formed and write a balanced equation showing the dissolution of the hydroxide into a soluble complex ion.

Explanation / Answer

Qualitative analysis and separation of metal ions

Reagents for separation,

a = 6 M HCl

b = AgCl (precipitate)

c = H2S

d = no-precipitate

e,f = NH4Cl, NH4OH

g = H2S

h = Fe(OH)3

i = Ni(NH3)4^2+

j = (NH4)2CO3

BaCO3 forms at the end

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