Transition Metal Reactions

Question 1

What is the charge of [Cr(H2O)6]?

Answer 1

3+

Question 2

What is the colour of [Cr(H2O)6]3+

Answer 2

Green and Violet Solution

Question 3

How does [Cr(H2O)6]3+ react with NaOH?

Answer 3

[Cr(H2O)6]3+ + 3OH-

Question 4

What is formed when [Cr(H2O)6]3+ reacts with NaOH?

Answer 4

[Cr(H2O)3(OH-)3] + 3H2O

Question 5

What colour is [Cr(H2O)3(OH-)3]?

Answer 5

Green Solid

Question 6

How does [Cr(H2O)6]3+ react with NH3?

Answer 6

[Cr(H2O)6]3+ + 3NH3

Question 7

What is formed when [Cr(H2O)6]3+ reacts with 3NH3?

Answer 7

[Cr(H2O)3(OH-)3] + 3NH4+

Question 8

What is the reaction for the chromium complex with excess NaOH?

Answer 8

[Cr(H2O)6]3+ + 4OH- -> [Cr(H20)2(OH)4]-1 +4H20

Question 9

What colour is [Cr(H20)2(OH)4]-1?

Answer 9

Green Solution

Question 10

What is the reaction of [Cr(H2O)6]3+ with concentrated NaOH?

Answer 10

[Cr(H2O)6]3+ + 6OH- -> [Cr(OH)6)]-3 +6H2O

Question 11

What colour is [Cr(OH)6]-3?

Answer 11

Green Solution

Question 12

What is the reaction for the chromium complex with excess NH3?

Answer 12

[Cr(H2O)6]3+ + 9NH3 -> [Cr(NH3)6]+3 + 3NH3 + 3OH- + 3H2O

Question 13

What colour is [Cr(NH3)6]+3?

Answer 13

Violet-Purple Solution

Question 14

What is the charge on the iron(II) complex [Fe(H2O)6]?

Answer 14

2+

Question 15

What colour is [Fe(H2O)6]2+

Answer 15

Green Solution

Question 16

How does [Fe(H2O)6]2+ react with NaOH?

Answer 16

[Fe(H2O)6]2+ + 2OH-

Question 17

What is the product of the reaction of [Fe(H2O)6]2+ with NaOH?

Answer 17

[Fe(H2O)4(OH)2] + 2H2O

Question 18

What colour is [Fe(H2O)4(OH)2]?

Answer 18

Green Solid

Question 19

How many NH3 does [Fe(H2O)6]2+ react with?

Answer 19

2
2NH3

Question 20

What is the product when [Fe(H2O)6]2+ reacts with 2NH3?

Answer 20

[Fe(H2O)4(OH)2] + 2NH4+

Question 21

What is the charge on the iron (III) complex [Fe(H2O)6]?

Answer 21

3+

Question 22

What colour is [Fe(H2O)6]3+?

Answer 22

Yellow-Brown solid

Question 23

How does [Fe(H2O)6]3+ react with NaOH?

Answer 23

3OH- (+ [Fe(H2O)6]3+)

Question 24

What is the product when [Fe(H2O)6]3+ reacts with NaOH?

Answer 24

[Fe(H2O)3(OH)3] + 3H2O

Question 25

What colour is [Fe(H2O)3(OH)3]

Answer 25

Brown Solid

Question 26

How does [Fe(H2O)6]3+ react with NH3?

Answer 26

Three NH3

Question 27

What is the product when [Fe(H2O)6]3+ reacts with 3NH3?

Answer 27

[Fe(H2O)3(OH)3] + 3NH4+