4. Sublimation can be employed as a purification technique for substances that have Short answer text 5. Having known that phthalic anhydride readily sublimes, what two separation techniques will allow the separation of the the components in a mixture containing phthalic anhydride, benzoic acid and sodium chloride?

4. Sublimation can be employed as a purification technique for substances that have Short answer text 5. Having known that phthalic anhydride readily sublimes, what two separation techniques will allow the separation of the the components in a mixture containing phthalic anhydride, benzoic acid and sodium chloride?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.5QAP

See similar textbooks

Similar questions

You are asked to determine the alkali present and the percentage of each in a component of a sample material containing components of NaOH, Na,co, and NaHCo, or mixtures of this together with inert material. Each sample being tested weighs 29 and uses hydrochioric acid for neutralization. Sample 1: Using phenolphthatein indicator. 48.64ml acid was used. A dupilcate sample needed 97.28mi of acid was used with methyl orange indicator. Sample 2: No color change using phenolphthalein as an indicator but with methyl orange 76.94mi acld is required. Sample 3. To cause a color change., the sample was titrated cold with phenolphthalein, 30.58ml of acid is necessary.and an addifional 33.19ml was required for complete neutralization Sample 4: The process required 79.92ml of acid until the pink of phenolphthalein disappeared. On adding the excess of the acid, boling and titrating back with alkali, it was found that the alkall was exactly equivalent to the excess acid added,
A suitable target for the titration is 30.0 cm3 of 0.025 moldm-3 Br2(aq) Justify why a much smaller target titre would not be appropriate Calculate the amount in moles of bromine in the target titer Justification? calculate a suitable massof alive oil to transfer to the volumetric flask using your answer to of above question and the structure of Y Assume that the olive oil contains 85/- of Y by mass (If you were unable to calculate the amount of bromine in the target titer,you should assume it is 6.25×10^-8 mol .this in not the correct amount)
1.Determine the color of the indicator in a given condition: METHYL ORANGE IN AN ACIDIC ENVIRONMENT. 2.This is the measure of reproducibility of data within a series of results. 3.This is the chemical to be subjected to testing in titrimetric method of analysis. 4.Determine the type of assay employed for this substance: TARTARIC ACID 5.Determine the color of the indicator in a given condition: PHENOLPHTHALEIN IN AN ALKALINE ENVIRONMENT. Please help me answer this questions. the answers are on the image I attached
3. Complete neutralization of 10 ml of phosphoric acid solution by NaOH 0.I N in the presence of phenol phthalein until the appearance of purple color (pH, = 9) 11 ml. of NaOH is consumed. (a) What is the concentration of phosphoric acid? (b) Calculate the indicator error. pk2.1 pK. - 7.2 pK - 124
A 10.00cm3 portion of the 100.00cm3 HCl solut was taken from the volumetric flask and was titrated with KOH (aq). It was neeutralized by 24.35cm3 of potassium hydroxide od concentration 0.0500moldm-3. Calculate the concentrat of the original concentrated hydrochloric acid in moldm-3.
1. A 2.2g methyl paraben (mEq of 0.152) was assayed using 50 ml of Sodium Hydroxide, 1.250 N and it consumed 31 ml to of 1.100N sulfuric acid to titrate the excess. In the blank, 42ml of the same acid solution was consumed. What is the percentage purity of Methylparaben? 2. If 25 ml of HCI solution required 26.25 ml of 0.0952N sodium hydroxide in a titration, what volume of the solution would produce 0.2867g of AgCl? (determine the N of acid solution, then use it for the volume that will react with AgCl) 3. A hydrochloric acid solution has AgCl titer of 0.1265, what is its Na2CO3 titer. ( determine the normality of acid using titer value of AgCl, then determine titer value of sodium carbonate) 4. Determine the weight of pure urea in a 500 mg sample if 15.35 ml of 0.4967N NaOH were required in the titration after the ammonia from the sample had been distilled into 50.0 ml of 0.4861N H2SO4.
A sample may contain NaOH, NazCO3 and NaHCO3, alone or in some combination, along with inert material. A samplewitha mass of 857.6 mgwas dissolved and titrated with0.1163 M HCI. The volume of HCl used from 0 to methyl red endpoint (Phenolphthalein endpoint was not monitored here) was found to be 36.54 mL. Another 228.8 mg portion of the sample was titrated to the phenolphthalein endpoint and 10.82 mL was used up for this titration. a. What is the composition of the sample? b. Calculate the percentage of each of the component present.
Write the equation for the reaction of each of the following bases in water and its corresponding Kb expression: (a) ammonia Kb (b) benzoate ion Kb (c) acetate ion Kb (d) monohydrogen citrate ion Kb (e) pyradine (C5H5N). Kb
The Merck Index indicates that 10 mg of guanidine,CH5N3, may be administered for each kilogram of bodymass in the treatment of myasthenia gravis. The nitrogenin a 4-tablet sample that had a total mass of 7.50 g wasconverted to ammonia by a Kjeldahl digestion, followedby distillation into 100.0 mL of 0.1750 M HCl. Theanalysis was completed by titrating the excess acid with11.37 mL of 0.1080 M NaOH. How many of thesetablets represent a proper dose for a patient who weighs(a) 100 lb, (b) 150 lb, and (c) 275 lb?
Give six differences between tituration and levigation
4. The molar absorptivities of the indicator weak acid HIn (K₁ = 1.42 x 105) and its conjugate base In at 570 were determined as ε(HIn) = 7120 and ɛ(In) = 961. The optical length b = 1.00 cm. (a) What is the absorbance of an unbuffered indicator solution having total indicator concentration 8.0 × 10%. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 x 105 and pH = 6.5.
Calcelate mokality of 52 (음)/ 아 to Solalicn. A) 0.65 p) 0 구2 () o.81 D) 0.94 Calulete pt of 0-001 M oK H Poa solation A) ) c) I.5 D) 2.5 NGOH 2 lit Hy soq mixed with Calulete pH of solution N of Nof slit of then A) 8.25 8) S.75 C) 7. 55 D) 9.45