Hello. You did not say what is the experiment to which this question refers, which makes it impossible for it to be answered accurately.
However, advice that should be given to anyone who should start an experiment is: establish a control treatment, provide all treatments with the same variables and the same resources, write down everything that happened in the experiment from implementation to data collection and results, make measurements and analyzes on the same date in all treatments and keep the steaks in the same environment.
Iron undergoes a chemical reaction called oxidation to form rust, or iron oxide. ... Copper forms a turquoise colored oxide and silver forms a black oxide. In both cases you know that a chemical reaction has taken place because of the color change.
Molarity = moles of solute/volume of solution (L)
0.5 moles/0.075 L = 6.67 M
Answer:
When the metal of the ionic compound has multiple oxidation states.
Explanation:
Nickel (Ni - At No 28) has multiple oxidation states* => −2, −1, 0, +1,[2] +2, +3, +4[3] (a mildly basic oxide)*. When naming compound of nickel on needs to include a roman numeral in parenthesis after the symbol of the element in order to identify which oxidation state is relevant.
examples
Nickel Halide derivatives include
NiCl => nickel(I) chloride
NiCl₂ => nickel(II) chloride
NiCl₃ => nickel (III) chloride
Such is important in that each of the compounds have different physical and chemical properties due to variations in oxidation states of nickel.
https://en.wikipedia.org/wiki/Nickel
