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In the Assay of Sodium Chloride, what is the purpose of adding nitric acid in the solution?  It is used to prevent precipitation of silver as carbonate It is used to hasten chemical reaction It is used to precipitate silver bromide It is used to form a film over silver nitrate precipitate What is the permanent color expected at the end poin

In the Assay of Sodium Chloride, what is the purpose of adding nitric acid in the solution?  It is used to prevent precipitation of silver as carbonate It is used to hasten chemical reaction It is used to precipitate silver bromide It is used to form a film over silver nitrate precipitate What is the permanent color expected at the end poin

Chemical Principles in the Laboratory
Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter27: Relative Stabilities Of Complex Ions And Precipitates Prepared From Solutions Of Copper(ii)
Section: Chapter Questions
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In the Assay of Sodium Chloride, what is the purpose of adding nitric acid in the solution? 
  1. It is used to prevent precipitation of silver as carbonate
  2. It is used to hasten chemical reaction
  3. It is used to precipitate silver bromide
  4. It is used to form a film over silver nitrate precipitate
What is the permanent color expected at the end point in the standardization of 0.1 N Ammonium Thiocyanate? *
 
  1. Orange red
  2. Blue
  3. Red
  4. Yellow
In the Standardization of 0.1 N Silver Nitrate, what is the purpose of allowing the mixture to stand in the dark? *
  1. It is used to aid in the formation of precipitate with large particles
  2. It is used to prevent the production of free silver
  3. It is used to acquire a purplish color in the precipitate
  4. It is used to maximize the reduction of silver chloride
In the standardization of 0.1 N Silver Nitrate, what is the most suitable temperature to dry the Silver Chloride precipitate to constant weight? *
  1. 115° C
  2. 110° C
  3. 100° C
  4. 120° C
Which is NOT a reason for preferring the disodium salt over the free acid in preparing EDTA? *
  1. It is more lipid soluble
  2. It is very stable
  3. It is more water soluble
  4. It is non-hygroscopic
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