Answer the following questions:a) How much As (74.9216 g/mol) is in the sample?b) Calculate % w/w As₂O₃ (197.841 g/mol) of the sample 11-12 The arsenic of a 2.000-g sample of a pesticide was converted to H;ASO4by acid treatment. The excess acid was then neutralized, and 50.00 mL of0.05871 M AgNO, was added to precipitate the arsenic quantitatively asAg-AsO4. The excess Agt in the filtrate and in the washings from the precipitatewas titrated with 10.21 mL of 0.1000 M KSCN.3-AsO4³(aq) + 3Ag+ (aq) → Ag3 AsO4(s)Ag+ (aq)+ SCN- (aq) → AgSCN(s)

Mass of As in the sample can be calculated by considering the amount of AgNO3 used to precipitate…

Answered: Answer the following questions: a) How…

Answer the following questions: a) How much As (74.9216 g/mol) is in the sample? b) Calculate % w/w As₂O₃ (197.841 g/mol) of the sample

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.20QAP

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.

Question

Answer the following questions:

a) How much As (74.9216 g/mol) is in the sample?

b) Calculate % w/w As₂O₃ (197.841 g/mol) of the sample

11-12 The arsenic of a 2.000-g sample of a pesticide was converted to H;ASO4
by acid treatment. The excess acid was then neutralized, and 50.00 mL of
0.05871 M AgNO, was added to precipitate the arsenic quantitatively as
Ag-AsO4. The excess Agt in the filtrate and in the washings from the precipitate
was titrated with 10.21 mL of 0.1000 M KSCN.
3-
AsO4³(aq) + 3Ag+ (aq) → Ag3 AsO4(s)
Ag+ (aq)
+ SCN- (aq) → AgSCN(s)

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