transition metal - complex ion colours

Question 1

what is the colour of the hexaqua complex for Cu 2+ ions?

Answer 1

blue

Question 2

what is the colour of the hexaqua complex for Fe 2+ ions?

Answer 2

light green

Question 3

what is the colour of the hexaqua complex for Fe 3+ ions?

Answer 3

yellow

Question 4

what is the colour of the hexaqua complex for Mn 2+ ions?

Answer 4

pink

Question 5

what is the colour of the hexaqua complex for Cr 3+ ions?

Answer 5

violet

Question 6

what is the colour of the precipitate with NaOH or NH3 for Cu 2+ ions?

Answer 6

blue

Question 7

what is the colour of the precipitate with NaOH or NH3 for Fe 2+ ions?

Answer 7

dark green

Question 8

what is the colour of the precipitate with NaOH or NH3 for Fe 3+ ions?

Answer 8

orange

Question 9

what is the colour of the precipitate with NaOH or NH3 for Mn 2+ ions?

Answer 9

light brown

Question 10

what is the colour of the precipitate with NaOH or NH3 for Cr 3+?

Answer 10

grey-green

Question 11

what is the colour with excess NH3 for Cu 2+ ions?

Answer 11

dark blue

Question 12

what is the colour for Cr 3+ ions and excess NH3?

Answer 12

purple

Question 13

what is the colour for Cr 3+ ions with excess OH-?

Answer 13

green