Transition Metal complexes

What colour and state is CuCO₃ ?

• deep blue solution

• blue green solid

• light blue solid

• light blue solution

A pale green solution has ammonia added to it dropwise. At first it forms a precipitate, and then there is a colour change. What is the final product?

• [Cu(NH₃)₄(H₂O)₂]²⁺

• Al(H₂O)₃(OH)₃

• [Fe(NH₃)₄(H₂O)₂]²⁺

• Fe(H₂O)₃(OH)₃

Which of the following complexes would undergo an acid base reaction with an acid to form a precipitate?

• [Al(OH)₄]^-

• [Al(H₂O)₆]³⁺

• CuCl₄^2-

• Al(H₂O)₃(OH)₃

Which of the following cannot form when ammonia solution is added to heaxaaqua metal complexes?

• Cu(H₂O)₄(OH)₂

• Fe(H₂O)₃(OH)₃

• [Al(OH)₄]^-

• [Cu(NH₃)₄(H₂O)₂]²⁺

Which of the following is formed by a ligand exchange reaction?

• [Cu(NH₃)₄(H₂O)₂]²⁺

• Cu(H₂O)₄(OH)₂

• [CuCl₄]^2-

• [Cu(H₂O)₆]²⁺

A metal ion can form complexes that are pale blue, yellow, and deep blue. What is that metal ion?

• Fe²⁺

• Al³⁺

• Fe³⁺

• Cu²⁺

Which of the following can react with sodium carbonate to form a gas?

• [Cu(H₂O)₆]²⁺

• [Fe(H₂O)₆]³⁺

• Al(H₂O)₃(OH)₃

• [Al(OH)₄]^-

Which of the following solid hydroxides can form when sodium hydroxide is used as a reagent with the hexaaqua metal complex?

• Cu(H₂O)₃(OH)₃

• [Fe(H₂O)₄(OH)₂]⁺

• Fe(H₂O)₃(OH)₃

• [Al(OH)₄]^-

Which of the following metal complexes has a co-ordination number of 6?

• [CuCl₄]^2-

• Fe(OH)₃

• Al(H₂O)₃(OH)₃

• Cu(OH)₂

Concentrated hydrochloric acid is added to a mixture of Cu(H₂O)₄(OH)₂ and Fe(H₂0)₃(OH)₃. Which of the following complexes cannot form?

• Fe(H₂O)₄(OH)₂

• [Cu(H₂O)₆]²⁺

• [CuCl₄]^2-

• [Fe(H₂O)₅(OH)]²⁺