A student prepared 2-butanone (C4H8O) in the lab. To determine the purity of the product, the ketone was reacted with excess hydroxylamine hydrochloride liberating HCI. In this study, as much as 3.00 ml of sample was diluted to 50 mL and was treated with an excess of hydroxylamine hydrochloride. The liberated HCI was then titrated with 0.9989 M NaOH, requiring 32.68 mL to reach the end point. 1. Show how 2-butanone can be prepared! 2. Determine the percent purity of the sample, given that the density of 2-butanone is 0.805 g/mL!

A student prepared 2-butanone (C4H8O) in the lab. To determine the purity of the product, the ketone was reacted with excess hydroxylamine hydrochloride liberating HCI. In this study, as much as 3.00 ml of sample was diluted to 50 mL and was treated with an excess of hydroxylamine hydrochloride. The liberated HCI was then titrated with 0.9989 M NaOH, requiring 32.68 mL to reach the end point. 1. Show how 2-butanone can be prepared! 2. Determine the percent purity of the sample, given that the density of 2-butanone is 0.805 g/mL!

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter23: Amines

Section23.6: Reactions With Acids

Problem 23.9P

See similar textbooks

Similar questions

To determine the purity of a synthetic preparation of methylethyl ketone, C4H8O, it was reacted with hydroxylamine hydrochloride, liberating HCl (reaction: NH2OH.HCl + C4H8O -> C4H9NO + H20 + HCl). In a typical analysis a 3.00-mL sample was diluted to 50.00 mL and treated with an excess of hydroxylamine hydrochloride. The liberated HCl was titrated with 1.2149 M NaOH, requiring 35 mL to reach the end point. A. Write the acid base reaction involved in the titration. B. Report the percent purity of the sample given that the density of methylethyl ketone is 0.805 g/mL.
When the ammonium salt (CH3CH2CH2)3NHCl is treated with NaOH, the products are water, NaCl, and an organic product. Provide the product in an attached file.
The pKas of chemicals HX and HY are 5 and 7 respectively. The pKa of carbonic acid H2CO3is 6. If you made up an ether solution of chemicals HX and HY in a separatory funnel, andthen added an aqueous solution of sodium bicarbonate NaHCO3 to that separatory funnel,would both HX and HY stay in the ether layer? Or would either or both of them transfer intothe aqueous layer? If one goes into the water layer, will it be in it’s neutral HX/HY form, or init’s deprotonated anionic form?
An amino acid mixture of phenylalanine, glycine and glutamic acid is to be separated bypaper chromatography. The solvent is less polar than water. Which of these amino acids will have the highest Rf value and which the lowest? Explain. Treatment of a new protein with dansyl chloride reveals two (2) dansyl-labelled derivatives of amino acids, alanine and methionine. What can you deduce about the structure of the protein from these results? Name the amino acids that contribute atoms to both purine and pyrimidine rings.
1.Which of the following correlations about the analyses of iodine and saponificationnumbers is/are incorrect?a. Alcoholic KOH: dissolve KOH to lipid sampleb. Hanus reagent: react with saturated lipid bondc. Reflux set-up: hasten reactiond. Blank titration: determine total mol of KOH2. A triacylglycerol (Sample X) was subjected to saponification analysis. 1.1 grams of thesample was refluxed with 5% alcoholic KOH and the refluxed solution was titrated with 17.2 mLof 0.44 M HCl titrant. The blank solution was titrated with 25.6 mL of the titrant.i. What is the saponification number of the sample? ii. Which of the following could be the identity of the sample? Show solutions pls a. Tripalmitin (MW: 807.3)b. Trilaurin (MW: 639.8)c. Triolein (MW: 885:4)d. Tristearin (MW: 891.48)
When some sugars dissolve in water they spontaneously undergo changes in optical rotation called mutarrotation. The Mutarrotation of D-glucopyranose is catalyzed by acid and bases. 2-Hydroxypyridine is a more effective catalyst than phenol and pyridine for this reaction because: a.Both oxygen and N in 2-hydroxypyridine act as bases increasing the rapid interconversion of sugar b. The OH of 2-hydroxypyridine serves as the base while the current N as the acid. c. 2-hydroxypyridine acts both as a base to remove the proton from the hydroxyl group in the hemiacetal and as an acid to provide a proton to the oxygen in the hemiacetal. d.Phenol and pyridine are very expensive.
What is the purpose of adding Na2CO3 into the collected tea extract beforeextraction with CH2Cl2?
1. The conversion of the concentrations into the required expression is as follows: Concentration given Expression required 0.5% NaCl molarity 1 mM of KBr mg/ml 5 mg/100 ml paracetamol Molarity 0.15 N H2SO4 g/litre 0.5% ethanol/water (w/v) ppm 2. 0.641 g of a semi-synthetic alkaloid was dissolved in 25 ml of 1% w/v acetic acid and was analysed directly by HPLC. The solution was found to contain 1.42 mg/100 ml of an impurity. What is the level of impurity in % w/w and ppm? 3. Calculate the pH of a buffer system made by dissolving 1.2 g of acetic acid and 0.82 g of sodium acetate in 500 ml of distilled water (pKa of acetic acid = 4.7) 0.641 g of a semi-synthetic alkaloid was dissolved in 25 ml of 1% w/v acetic acid and was analysed directly by HPLC. The solution was found to contain 1.42 mg/100 ml of an impurity. What is the level of impurity in % w/w and ppm?
2-chlorobenzoic acid (C 6 H 4 ClCOOH) is produced by diazotization. 6.25 g of anthranilic acid (0-aminobenzoic acid, C 6 H 4 NH 2 COOH) is allowed to react with 3.5 g of sodium nitrite in hydrochloric acid solution, whereby diazonium (C 6 H 4 N 2 ClCOOH) is formed. 4.5 grams of Cu(I) chloride are dissolved in conc. hydrochloric acid and 5 mL of water, after which the diazonium solution is added, whereby 2-chlorobenzoic acid is formed. The acid is separated and purified by recrystallization. 3.02 grams of product is obtained. Calculate the yield.
Multistep synthesis of Lidocaine Lab 1) How many grams of starting material do you need? It is given in moles below but how many grams? 2) How to calculate theoretical yield? Part One Method A. Preparation of alpha-Chloro-2,6-dimethylacetanilideCombine 0.033 mol of 2,6-dimethylaniline with 25 mL of glacial acetic acid (or ethyl acetateor THF) and 0.033 mol of alpha-chloroacetyl chloride, in that order, in an appropriately sized Erlenmeyer flask. With the aid of a hot water bath, warm the solution to 40-50°C, remove the flask from the bath, and add a solution of 5 g of sodium acetate trihydrate dissolved in 100 mL of water.
WILL HEXANE DISSOLVE fenethylline IN GC-MS?
To synthesize Tylenol, p-aminophenol will be acetylated using 1.4 equivalents of acetic anhydride. Starting with 2.1 g p-aminophenol, how what volume (in mL) of acetic anhydride is required?