colours and products of Cu2+ (aq) ions reactions

Question 1

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with concentrated HCl

Answer 1

[CuCl4]2-

blue solution to green solution

Question 2

what product is formed when…

[Cu (H2O)6] 2+ is reacted with EDTA 4-

Answer 2

[Cu (EDTA)] 2-

Question 3

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with Na2CO3

Answer 3

CuCO3

blue solution —> blue -green ppt

Question 4

what colour is [Cu (H2O)6 ] 2+

Answer 4

blue solution

Question 5

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with NaOH

Answer 5

Cu (H20)4 (OH)2 (s)

blue solution —> blue ppt

Question 6

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with excess NaOH

Answer 6

no further change

Question 7

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with NH3

Answer 7

Cu (H20)4 (OH)2 (s)

blue solution —> blue ppt

Question 8

what product is formed and what colour is the product when…

[Cu (H2O)6] 2+ is reacted with excess NH3

Answer 8

[Cu (H2O)2 (NH3)4 ]2+ (aq)

blue solution —> deep blue solution

LIGAND SUBSITUTION REACTION

Question 9

what product is formed and what colour is the product when…

Cu (H20)4 (OH)2 (s) is reacted with excess NH3

Answer 9

blue ppt —> deep blue solution

[Cu (H2O)2 (NH3)4 ]2+ (aq)

LIGAND SUBSITUTION REACTION