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A student was asked to determine the percentage of the components of a binary mixture of KBr, potassium bromide, and Mg (OH)2, magnesium hydroxide. The mass of the mixture used was 6.321 grams. The student extracted the KBr with water since KBr is soluble in water and Mg(OH)2 is not. The magnesium hydroxide remained in the container after the KBr was extracted with water.  After evaporation of the filtrate, the KBr residue was dried and weighed. Its dry mass was found to be 2.864g. The insoluble Mg(OH)2 was also dried and had a mass of 3.204 grams.  a. Calculate the percent of KBr in the mixture.  b. Calculate the percent of Mg(OH)2 in the mixture.  c. Calculate the percent of recovery using the total mass of substances recovered.  d. Calculate the percent error of this total recovery.

A student was asked to determine the percentage of the components of a binary mixture of KBr, potassium bromide, and Mg (OH)2, magnesium hydroxide. The mass of the mixture used was 6.321 grams. The student extracted the KBr with water since KBr is soluble in water and Mg(OH)2 is not. The magnesium hydroxide remained in the container after the KBr was extracted with water.  After evaporation of the filtrate, the KBr residue was dried and weighed. Its dry mass was found to be 2.864g. The insoluble Mg(OH)2 was also dried and had a mass of 3.204 grams.  a. Calculate the percent of KBr in the mixture.  b. Calculate the percent of Mg(OH)2 in the mixture.  c. Calculate the percent of recovery using the total mass of substances recovered.  d. Calculate the percent error of this total recovery.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter4: Chemical Reactions
Section: Chapter Questions
Problem 4.84QP: A soluble iodide was dissolved in water. Then an excess of silver nitrate, AgNO3, was added to...
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A student was asked to determine the percentage of the components of a binary mixture of KBr, potassium bromide, and Mg (OH)2, magnesium hydroxide. The mass of the mixture used was 6.321 grams. The student extracted the KBr with water since KBr is soluble in water and Mg(OH)2 is not. The magnesium hydroxide remained in the container after the KBr was extracted with water. 

After evaporation of the filtrate, the KBr residue was dried and weighed. Its dry mass was found to be 2.864g. The insoluble Mg(OH)2 was also dried and had a mass of 3.204 grams. 

a. Calculate the percent of KBr in the mixture. 

b. Calculate the percent of Mg(OH)2 in the mixture. 

c. Calculate the percent of recovery using the total mass of substances recovered. 

d. Calculate the percent error of this total recovery. 

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