The indicator that can best estimate the first and second equivalence points are(i) and (ii), respectively. Hd 14 12 10 2 Titration of an Unidentified Base 100 200 Volume of HCI (mL) O Phenolphthalein bromocresol green Indigo carmine methyl orange Alizairin yellow R chlorophenol red O 1,3,5-trinitrobenzene bromothymol blue 300

The indicator that can best estimate the first and second equivalence points are(i) and (ii), respectively. Hd 14 12 10 2 Titration of an Unidentified Base 100 200 Volume of HCI (mL) O Phenolphthalein bromocresol green Indigo carmine methyl orange Alizairin yellow R chlorophenol red O 1,3,5-trinitrobenzene bromothymol blue 300

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter14: Principles Of Neutralization Titrations

Section: Chapter Questions

Problem 14.9QAP

See similar textbooks

Similar questions

Given three acid-base indicatorsâ€”methyl orange (end point at pH 4), bromthymol blue (end point at pH 7), and phenolphthalein (end point at pH 9)â€”which would you select for the following acid-base titrations? (a) perchloric acid with an aqueous solution of ammonia (b) nitrous acid with lithium hydroxide (c) hydrobromic acid with strontium hydroxide (d) sodium fluoride with nitric acid
Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH, stoichiometric points occur at pH = 3.9 and 8.8. A 25.00-mL sample of malonic acid of unknown concentration is titrated with 0.0984 M NaOH, requiring 31.50 mL of the NaOH solution to reach the phenolphthalein end point. Calculate the concentration of the initial malonic acid solution. (Sec Exercise 113.)
Explain why an acid-base indicator changes color over a range of pH values rather than at a specific pH.
If the pKa of the indicator is approximately 6, to which of the following equivalence point will it be most suitable? pH 5 pH 10 pH 4 pH 13
One Erlenmeyer contains 50 mL of 0.1 M Na2CO3 solution, the other Erlenmeyer contains 50 mL of 0.1 M NaHCO3 solution. Answer the following questions when both solutions are titrated with 0.1 M HCl (F=1) solution separately: a) How much mL will be consumed if the phenolphthalein indicator is used? b) How much mL will be consumed if the methyl orange indicator is used? please explain than solve
Use the table of indicators below to choose the most appropriate indicator to use when titrating Fill in the blanks by selecting benzoic acid with sodium hydroxide as described in the previous problem -- one option from each menu. methyl orange thymol blue 5 points Thymol blue Bromophenol blue Methyl orange Bromocresol green Methyl red Bromthymol blue Litmus Phenolphthalein bromocresol green methyl red bromophenol blue Alizarin yellow R T 0 1 2 3 4 6 7 9 10 11 12 13 PH
Use the table of indicators below to choose the most appropriate indicator to use when titrating benzoic acid with sodium hydroxide as described in the previous problem. Thymol blue Bromophenol blue Methyl orange Bromocresol green Methyl red Bromthymol blue Litmus Phenolphthalein Alizarin yellow R 01 23 6 7 9 10 11 12 13 HG рн
In the experiment, we used titration to determine the total acid content ofsamples, which we reported in terms of molarity. Reporting acidity through pHmeasurements is quite different, in that we can only measure the amount of theacid in its ionized form. You were tasked to investigate a clear aqueous solutionof an unknown monoprotic acid. You decided to use two methods togather data.Method 1 – TITRATION: A 10. mL aliquot of the sample was diluted with 25 mLdistilled water. Two drops of phenolphthalein were added and then it was titrated3.54 mL of 0.048 M standardized NaOH to the endpoint.Method 2 – pH STRIP: You took 1 mL of the sample and used a pH strip toestimate the pH, which turned out to be around 3.3. Another 1 mL of the samplewas diluted with 9 mL of water. The pH was taken again and is now around 3.8.a) Calculate the molarity of the acid using the titration data.b) If we assume that the titrated unknown is a strong acid, predict thepH of the sample.c) Using pH strip results,…
What is the approximate pH of a solution X that gives the following responses with the indicators shown? Indicators HIn → In- pH range Solution X methyl orange red-yellow 3.2-4.4 yellow methyl red red-yellow 4.8-6.0 yellow bromthymol blue yellow-blue 6.0-7.6 green phenolphthalein colorless-pink 8.2-10.0 colorless 8.2-10.0 3.2 -4.4 6.0 - 7.6 4.8 - 6.0
How does diphenylamine sulfonate indicator work? Give specifics on how it is an indicator
File Edit View Insert Format Tools Add-ons He Introduction Procedure Observation Observations: 100% 1 2 I 3 I 4 Initial solution temperature (°C): 20.8°C Maximum solution temperature (°C):27°C Recall that the steepest point on the pH curve occurs at the equivalence point, that is, when the acid is exactly neutralized. Total volume of NaOH titrated to reach end-point or neutralization (steepest point on the pH curve):25ml 14 13 Mass of solution (g) = (Volume of NaOH titrated (ml) + Volume of HCl (ml)) x density Mass of solution = 76 g 34 32 31 30 29 Note: Assume a density of 1.038 for both NaOH and HCI 11 10 pH Heat released by neutralization: 27 Q = mcAT Q = 1.9 x 10^3 J 25 where m is the mass solution in grams, c = specific heat capacity of our solution (=4.184 J/°C g) and AT=T, max 23 22 21 20 Tinitial- Heat of Neutralization = Q/moles of limiting reactant Q/moles of NaOH titrated at neutralization Q/(Molarity of NaOH x volume of NaOH (in litres)) 10 15 20 25 30 35 40 45 %3D Volume…
3. One erlenmeyer contains 50 mL of 0.1 M Na2CO3 solution, the other erlenmeyer contains 50 mL of 0.1 M NaHCO3 solution. Answer the following questions when both solutions are titrated with 0.1 M HC1 (F=1) solution separately: a) How much mL will be consumed if the phenolphthalein indicator is used? b) How much mL will be consumed if the methyl orange indicator is used?