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Chromium (III) oxide, often called chromic oxide, has been used as green paint pigment, as a...

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Chemistry

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?

Answer & Explanation Solved by verified expert
4.0 Ratings (709 Votes)
Answer a We are given reaction between sodium dichromate Na2Cr2O7 and ammonium chloride form the chromium III oxide sodium chloride nitrogen and water so the balanced reaction for this one as follow Na2Cr2O7s 2NH4Cls Cr2O3s 2NaCls N2g 4H2Og b we are given mass of mass of Na2Cr2O7s 275 mg Calculation    See Answer
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