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Discuss the principles behind the titrations used to determine copper and NH3 in the Synthesis of Copper-Ammonia Complex
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- Why must the methanol be added slowly during the precipitation process in the Copper-Ammonia ComplexExplain why K2CrO4 is used as an indicator in Argentometric titration?What is the role of cobalt glass for the flame test of potassium? Explain. Why was the flame test used for the qualitative determination of K and Na? Why was the sample being made alkaline with 3M KOH and heated for the qualitative test for NH4+?
- 6. The solubilities of the sulfate and chromate of Barium in this reagent is used to distinguish the 2 compounds. (Provide only the chemical formula) 7. How should you write the chemical formula of zinc ammonia complex ion? 8. Identify the chemical formula of Grp 3 cation/s that form a pink precipitate when treated with thioacetamide. 9. What reagent acts as buffer to prevent precipitation of Magnesium Hydroxide during the analysis of Grp 3 cations? (chemical formula) 10. What ion is reduced when a precipitate which may contain Barium Chromate is added with HCl and concentrated? (chemical formula of the resulting reduced ion)explain the importance of iodometric titration methods for the determination of iodine content in salt.What is the purpose of adding concentrated ammonia in the elimination test for cations? Select one: a. because NH3 is a stronger base than NaOH b. to provide a strongly basic solution c. to determine if the hydroxide precipitates are amphoteric d. to determine if the test ions form NH3 complexes e. to determine if the NH3 solution oxidizes the test ions
- In the iron (II)-silver ion system performed in the experiment, all of the following successfully confirmed that each of the chemical species is present in the system EXCEPT. -Formation of white precipitate when HCl was added in the system -Deposition of silvery solids when FeSO4 and AgNO3 were mixed together -Formation of dark blue solution when K3Fe(CN)6 was added in the system -Transformation of pale orange to solution into a blood red solution when KSCN was added in the systemDiscuss the solubility product constant values of silver halides in accordance with HSAB theory.1. How is complete precipitation assured in the Group III Cations? 2. In the confirmatory test of Magnesium ion, why is it necessary to heat the centrifugate in water bath for 5 minutes? 3. If Magnesium hydroxide is a white gelatinous precipitate, why is the confirmatory result indicated a blue precipitate?
