Question 2Answer all the question below,1. In one gravimetric analysis, a sample that weighed 0.810g is analysed for itsphosphorous (P) content by precipitating the phosphorous as Mg,P2O. The precipitateis filtered, washed and weighed. The mass of the precipitate is found to be 0.4250 g.a) Why must the precipitate be washed?b) Calculate the percentage of P.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 Al203 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?

Answer all the question below, 1. In one gravimetric analysis, a sample that weighed 0.810g is analysed for its phosphorous (P) content by precipitating the phosphorous as Mg,P,0,. The precipitate is filtered, washed and weighed. The mass of the precipitate is found to be 0.4250 g. a) Why must the precipitate be washed? b) Calculate the percentage of P.

Answer all the question below, 1. In one gravimetric analysis, a sample that weighed 0.810g is analysed for its phosphorous (P) content by precipitating the phosphorous as Mg,P,0,. The precipitate is filtered, washed and weighed. The mass of the precipitate is found to be 0.4250 g. a) Why must the precipitate be washed? b) Calculate the percentage of P.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.48QAP

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