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Why is nitric acid added when ammonium thiocyanate solution is standardized?
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- Why a precipitate of manganese dioxide be removed from the potassium permaganate solution before standardization?Why is there a need to immediately titrate the sample solution with the standard sodium thiosulfate solution after generating the iodine in the mixture?Why would buffered solution tests be compared to distilled water?
- 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 point in the standardization of 0.1 N Ammonium Thiocyanate? * Orange red Blue Red Yellow In the Standardization of 0.1 N Silver Nitrate, what is the purpose of allowing the mixture to stand in the dark? * It is used to aid in the formation of precipitate with large particles It is used to prevent the production of free silver It is used to acquire a purplish color in the precipitate 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? * 115° C 110° C 100° C 120° C Which is NOT…Write measurement of Carbon dioxide evolution during respiration of germinating seeds by the Titration methodWhy was gravity filtration used instead of evaporation to isolate the calcium carbonate?
- Why is rinsing of the burettes both with distilled water and solution a critical step in titration?What weight of the soda ash (impure Na2CO3) should be taken for analysis in order that the number of milliliters of 0.500 N acid used will be equal to one-half of the percentage of Na2CO3 in the sample? Note: Please include the complete solution. Thanks!given the molar mass of of compound A as 327.34g/mol and the mass being 0.016g. calculate the concentration of compound A (the stock standard) if it is mixed with 50ml water then 2ml, 4ml and 6ml of the stock standard are measured into a 10ml volumetric flask. calculate the concentrations of the 2ml, 4ml and 6 ml solutions.