Why do you need to swirl the flask constantly during the titrimetric analysis? a. To look cool during the experiment b. To distribute the titrant throughout the sample c. To prevent the accumulation of phenolphthalein on the center of the solution d. To preserve the sample Due to your excitement for the experiment, you forgot to remove air bubbles in the burette while performing standardization. You only noticed when you saw the bubble below the stopcock. What would be its effect on the concentration of the unknown sample? a. Increase b. Decrease c. No effect d. Cannot be determined All of the following criteria must be met for a titrimetric analysis to be feasible EXCEPT: a. Reaction between the standard and analyte must be known. b. Reaction between the reactants must be slow. c. Reaction must proceed quantitatively to completion. d. There should be a substance for endpoint detection

Why do you need to swirl the flask constantly during the titrimetric analysis? a. To look cool during the experiment b. To distribute the titrant throughout the sample c. To prevent the accumulation of phenolphthalein on the center of the solution d. To preserve the sample Due to your excitement for the experiment, you forgot to remove air bubbles in the burette while performing standardization. You only noticed when you saw the bubble below the stopcock. What would be its effect on the concentration of the unknown sample? a. Increase b. Decrease c. No effect d. Cannot be determined All of the following criteria must be met for a titrimetric analysis to be feasible EXCEPT: a. Reaction between the standard and analyte must be known. b. Reaction between the reactants must be slow. c. Reaction must proceed quantitatively to completion. d. There should be a substance for endpoint detection

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter88: Column Chromatography

Section: Chapter Questions

Problem 5P

See similar textbooks

Similar questions

IF an analytical balance was not calbirated before gravimetry analyses, what will happen to the mass of final precipitate? Is it a Postive Error, Negative Error, No effect?
Why do you need to swirl the flask constantly during the titrimetric analysis? a. To prevent the accumulation of phenolphthalein on the center of the solution b. To preserve the sample c. To distribute the titrant throughout the sample d. To look cool during the experiment
Can you proceed with sample analysis even without standardizing the titrant solution? Why or why not? You have finished two trials of the sample analysis for the experiment and you noticed that the burette is almost empty (~5 mL remaining). Should you add more titrant before the next sample analysis or not? Why or why not?
volumetric or graduated piptte, Which one of them is commonly used for Titration and reagent and which one is more accurate, why?
. 100 ml boiled cooled and filtered water sample takes 9.6 ml of M/50 EDTA in titration. The Permanent hardness of the water sample in terms of ppm of CaCO3 equivalent is
Why is the titration done with vigorous swirling?
Average mass of the precipitate MgNH4PO4·6H2O (s) / g Average phosphate concentration in water sample (mass/volume %) % difference of 2 trials
a) When considering the overall dialysis procedure, why is it important to exchange old/used dialysis buffer (or “dialysate” solution) with a fresh dialysis buffer solution at least once throughout the process? NOTE: Your TAs will do this for your group’s samples over the next week. b) This week’s lab utilizes a dialysis buffer with the following composition: 10 mM Tris-HCl, 10 mM MgSO4, and a pH of 7.4. Let’s presume an ERROR occurred with the creation of this buffer during the pH titration and you unknowingly titrated to a final pH of 5.0. What effects, if any, could you expect to observe on your final, dialyzed sample?
True or False Very Insoluble precipitates are not the best candidates for gravimetric analysis.
To which sample solution the spike will be add? the distillate>130C the mass standard the distilled <130C
100 mL water sample was subjected to DO analysis using the Winkler method. The initial reading of the titrant (0.025 M Na2SO3) in the buret was 2.51 mL. The endpoint was obtained and the final reading was 7.07 mL. A blank was also titrated and 0.75 mL of the titrant was consumed. Compute for the amount of DO (mg/L) in the sample.
The KI used in this lab has a concentration of 0.500M. In trials 1-4, 1.0 ml of this solution is combined with 4.0 ml of the H2O2. What is the concentration of the KI in this solution after mixing but before the reaction occurs. ( Enter the result in table 1 on the report sheet)