Standard solutions of most reductants are used in back titration because. a. Their reactions with the analyte are very slow b. The endpoints can't be detected c. They undergo reaction with atmospheric oxygen d. All of the above
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- Using the term u of KSP experimental procedure the 6 p.m. As you add 5 ml of .004M AgNo to 5ml of .0025M K2CrO4. Is either of these reagents in excess? If so which one?Explain why in Mohr's method neutral medium should be used in titration of AgNO3?xpress numerical result with an accuracy of: Х,Х 1. The substance to be analyzed – is deep-pink colored, highly soluble in water salt. Reaction with NH3 gives blue-colored precipitate, which can be dissolved in NH3 surplus accompanied by dirty-yellow colored solution formation. After precipitation of cation by “sodium carbonate drawing out” method, supernatant was independently treated by silver nitrate solution and barium chloride solution (in acid medium in both cases) – any precipitation hasn`t been observed. Addition of antipyrin in acid medium changes color to red. What kind of substance is this? Explain you answer, provide chemical equations
- Suppose you have prepared s compound which is reported in the literature to have a pale blue color. When dissolving the substance in hot solvent prior recrystallization, the resulting solution is blue. Should you use decolorizing charcoal before allowing the hot solution to cool? Explain your answer.In the Mohr Method Determination of Chloride, why must the titration be in neutral condition to be carried out? What will be the side reactions if it is done in basic as well as acidic conditions?Explain brieflyWhat would happen to the total hardness if the solution was buffered to pH 13.00? What is done to the soda ash solution when the pre-equivalence point of the methyl orange endpoint is reached? What compound is trying to be removed?
- Calculate the molecular weight from the titration data. What does that suggest about how many nitro groups were added?Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. CuSO4From the stock solution (0.040 M), pipet 0.00, 2.00, 5.00, 10.00, 15.00 and 20.00 aliquots into 100 mL volumetric flasks. Develop the color (royal blue) by adding enough NH3 solution to form Cu(NH3)42+ complex. Add 10 mL excess to stabilize to complex. Dilute to the desired volume. Determine the concentration of each standard solution and tabulate. *I'm not sure if a Dilution Factor (DF) is still needed in here but I hope you can also explain this if DF is still needed in the computation.Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. CuSO4From the stock solution (0.040 M), pipet 0.00, 2.00, 5.00, 10.00, 15.00 and 20.00 aliquots into 100 mL volumetric flasks. Develop the color (royal blue) by adding enough NH3 solution to form Cu(NH3)42+ complex. Add 10 mL excess to stabilize to complex. Dilute to the desired volume. Determine the concentration of each standard solution and tabulate.
- What is/are the principle/s involved on ACIDIMETRIC ASSAY BY DOUBLE INDICATOR TITRATION?Find how many % of I2 in 1000 mL H2O will still be in its aqueous phase if it was extracted with CHCl3 for a single time. Note: Suppose that KD is 160.1. Why is it necessary to use a buret for measuring standard AgNO3 solution in volhard method? 2. What is the effect of discolored AgNO3 on the concentration of KSCN? 3. Why is necessary to use boiled 6N HNO3 in volhard? 4. why is the titration done with vigorous swirling? 5. A solution of AgNO3 is added to a solution containing 0.100 Cl- and 0.100M CrO4-, at what Ag+ concentration will Ag2CrO4 begin to precipitate? and what will be the concentration of the less soluble compound when the more soluble one begins to precipitate?