GRAVIMETRIC ANALYSIS: DETERMINATION OF THE EMPIRICAL FORMULA OF MAGNESIUM CHLORI

Question

GRAVIMETRIC ANALYSIS: DETERMINATION OF THE EMPIRICAL FORMULA OF MAGNESIUM CHLORIDE ADVANCED STUDY ASSIGNMENT Name Section Date Produced by the reaction of bismuth metal with H ,Sonp) Experimental Measurements Mass of 150 mL Beaker Mass of Beaker and bismuth metal Mass of Beaker and bismuth sulfide (inal heating) 56.900 g 57.735 g 57.931 g Calculation Summary Mass of bismuth sulfide (final heating) Mass of bismuth in the compound Mass of sulfur in the compound Number of moles of bismuth in the compound Number of moles of sulfur in the compound Empirical Formula of bismuth sulfide Empirical Formula Mass of bismuth sulfide Experimental % bismuth in the compound Theoretical % bismuth in the formula Relative Error moles Bi moles S Continued on the reverse

Explanation / Answer

Ans 1 :

The net ionic equation for the formation of Bismuth sulfide is given as :

2Bi3+ + 3S2- = Bi2S3

Ans 2 :

Since the charge of S atom in bismuth sulfide is -2 , and the overall charge on the molecule is 0.

So the charge on Bismuth will be +3.

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