2. In one gravimetric analysis, the aluminum in a 1.2g sample of impureNHAI(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate wasfiltered and ignited at 1000 °C to give anhydrous Al2O3 which weighed 0.1798g.Calculate the % Al inthe sample.3. A sample of 0.4500g impure potassium chloride was dissolved in water treatedwith excess silver nitrate solution. 0.8402 g of silver chloride was precipitated.What is the percentage of potassium chloride in the sample?

Answered: Image /qna-images/answer/972c6249-d7eb-4b41-8f72-8ff024b3c1e5.jpg

2. In one gravimetric analysis, the aluminum in a 1.2g sample of impure NHA1(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate was filtered and ignited at 1000 °C to give anhydrous Al2O3 which weighed 0.1798g. Calculate the % Al inthe sample.

2. In one gravimetric analysis, the aluminum in a 1.2g sample of impure NHA1(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate was filtered and ignited at 1000 °C to give anhydrous Al2O3 which weighed 0.1798g. Calculate the % Al inthe sample.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter12: Gravimetric Methods Of Analysis

Section: Chapter Questions

Problem 12.20QAP

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Question

2. In one gravimetric analysis, the aluminum in a 1.2g sample of impure
NHAI(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate was
filtered and ignited at 1000 °C to give anhydrous Al2O3 which weighed 0.1798g.
Calculate the % Al inthe sample.
3. A sample of 0.4500g impure potassium chloride was dissolved in water treated
with excess silver nitrate solution. 0.8402 g of silver chloride was precipitated.
What is the percentage of potassium chloride in the sample?

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