Chromium (III) oxide, often called chromic oxide, has been usedas green paint pigment, as a catylistin organic synthesis, as apolishing powder, and to make metallic chromium, One way to makechromium (III) oxide is by reacting sodium dichromate, Na2Cr2O7with ammonium chloride at 800 to 1000 degrees celcius to formchromium (III) oxide, sodium chloride, nitrogen and water.
a) write a balanced equation for this reaction
b) What is the minimum mass, in megagrams, of ammonium chloridenecessary to react completely with 275 Mg of sodium dichromate,Na2Cr2O7?
c) What is the maximum mass, in megagrams, of chromium (III)oxide that can be made from 275 Mg of sodium dichromate, Na2Cr2O7,and excess ammonium chloride?
d) If 147Mg of chromium (III) oxide is formed in the reaction of275 Mg of sodium dichromate, Na2Cr2O7, with excess ammoniumchloride, what is the percent yeild?
