Apopular way in chemistry to demonstrate oxidation states is to show the color changes that occur as chromium is reduced. a. a solution of potassium dichromate is reduced to chromium(ll) ions by zinc metal in the presence of an acid causing the solution to change in color from orange to green. what is the oxidation state of the chromium in the potassium dichromate molecule? b. write the balanced half reactions and net ionic equations for this reaction. c. this green solution of chromium (ll) can be further reduced by zinc metal to a blue solution containing chromium(ll) ions. write the balanced half reactions and net ionic equation for this reduction