Which of the following is a qualitative analysis technique?a) Gravimetric analysisb) Volumetric analysisc) Spectroscopyd) Titration

Option a: This option is incorrect because it is a quantitative chemical analysis in which the…

Answered: Which of the following is a qualitative…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter14: Principles Of Neutralization Titrations

Section: Chapter Questions

Problem 14.5QAP

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Similar questions

Describe the challenges involved in qualitative analysis. Despite the challenges, do you think this is a useful technique?
Titration Titrant Primary Standard I. Complete the table Write your answers in the answer booklet provided. Color change/end point Indicator detection Acid-Base (1) KHP Phenolphthalein (8) HCI (3) Phenolphthalein (9) Redox Complexometric KMnO4 EDTA (4) (5) (10) CaCO3 (6) (11) Precipitation (2) NaCl (7) Formation of brick red ppt (Mohr Method) Na2CO3 starch Fill in the table above with the choices from the answer bank that follows. You can select one choice more than once or not at all. If the answer is not found below, write "none". KSCN Fe3+ yellow to orange AgNO3 NaOH yellow green to pink K₂CrO4 Red to yellow pink to colorless KMnO4 formation of red complex deep blue to colorless colorless to pink/red AS2O3 KSCN EBT purple to colorless colorless to purple red to blue Na2C2O4 Cu Acid-Base Fluorescein Argentometric colorless to deep blue Volhard
c) Give an example of a complexometric titration with equations explaining the reactions that occur. Include the role played by dye acting as indicator.
If the equivalence point of titration is overshot, how will this affect the calculated concentration of acid? (Will it be too high or too low?) Explain. How can you improve accuracy?
In a system where a weak acid is an analyte, a strong base is a titrant, what is the milestone pH range, and which of the Metrol thrush phenolphthalein and litmus indicators would you choose?
Which of the following compunds is a weak acid? a) Phenol b) cyclohexanol c) ethanol d) 2-methyl-2-propanol In chromatography, the compound that is least soluble in the mobile phase
You need to determine the pKa of a weak acid. You can obtain the necessary data for this by titrating a sample of the weak acid with a standardized solution of ... HCI using a pH meter HCI using methyl orange indicator O NaOH using methyl orange indicator NaOH using a pH meter NaOH using phenolphthalein indicator O HCI using phenolphthalein indicator
If you were to overshoot tje endpoint in the titration of your unknown acid, would youncalculated molar mass be higher, lower or equal to the actual molar mass
For a weak acid/strong base titration, if the titration mixture is a dark pink, which of the following is correct? 1. The calculated concentration of weak acid is underestimated because the amount of strong base required to reach and endpoint is underestimated. 2. The calculated concentration of weak acid is overestimated because the amount of strong base required to reach the endpoint is overestimated 3. the calculated concentration of weak acid is underestimated because the amount of strong base required to reach the endpoint is overestimated
Why are the standard reagents used in neutralization titrations generally strong acids and bases ratherthan weak acids and bases? Explain.
Addition of the indicator methyl orange to an unknownsolution leads to a yellow color. The addition of bromthymolblue to the same solution also leads to a yellow color.(a) Is the solution acidic, neutral, or basic? (b) What is therange (in whole numbers) of possible pH values for the solution?(c) Is there another indicator you could use to narrowthe range of possible pH values for the solution?
2. Below is a titration curve generated by a similar titration to the ones simulated, Vinegar Titration Curve 14.00 13.00 12.00 11.00 10.00 9.00 8.00 * 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 Volume NaOH (mL) We can use this curve to estimate the pka of our weak acid by what is called the "half equivalence point method". The equivalence point is the middle of the steepest part of this graph. Estimate the volume of NaOH added to the titration at that point by using a rule or other straight edge to follow that point down to the x-axis. Divide that volume by 2 (half the equivalence point) and estimate the pH at that volume of NaOH using your straight edge again. pKa = pH at the half equivalence point. What do you estimate the pka to be? 3. The pka of acetic acid is 4.76. Calculate percent error between the true value and your estimated value from question 2.

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Which of the following is a qualitative analysis technique? a) Gravimetric analysis b) Volumetric analysis c) Spectroscopy d) Titration