Yellow/brown precipitate formed with addition of dilute ammonia dropwise.

Further addition of ammonia resulted in either no change or the formation of more yellow/brown precipitate.

Green/blue precipitate formed with addition of dilute ammonia dropwise.

Further addition of ammonia resulted in dissolution of the solid and the formation of a dark blue, transparent solution.

White precipitate formed with addition of dilute ammonia dropwise.

Further addition of ammonia resulted in dissolution of the solid and the formation of a colourless, transparent solution.

Blue/green precipitate formed with addition of dilute ammonia dropwise.

Further addition of ammonia resulted in partial dissolution of the solid and the formation of either a green or orange/brown, transparent solution.