a)what is the name and molecular formula of the reagent responsible for the formation of the nickel complex ions?
b)What is the color of this complexation?
I suspect you had a specific lab you did, and had a specific nickel complex formed.
http://www.youtube.com/watch?v=hDt2OUnOcug&feature=player_embedded
oh um. it was Ni(OH)2 forming a green solid.
a) To determine the name and molecular formula of the reagent responsible for the formation of nickel complex ions, we need to understand the specific reaction or coordination complex being referred to.
However, in general, nickel complex ions can be formed by the reaction of nickel salts with suitable ligands. Common ligands for nickel complex formation include ammonia (NH₃), water (H₂O), chloride (Cl⁻), cyanide (CN⁻), and many more.
For example, if we consider the reaction between nickel chloride (NiCl₂) and ammonia (NH₃), the resulting complex ion formed is called tetraamminenickel(II) chloride, and its molecular formula is [Ni(NH₃)₄]Cl₂.
b) The color of a specific nickel complexation depends on the ligands coordinating with the nickel ion. Different ligands can cause variations in the electronic transitions within the complex, resulting in different colors.
For example, nickel complexes involving ligands like ammonia tend to be pale green or blue-green in color, while complexes with ligands like water or chloride can be pale blue or yellow.
To determine the exact color of a specific nickel complex, one would need to refer to the coordination compound literature or conduct experimental observations.