Acetanilide 14,3°C compound identity literature m.p. of compound experimental m.p. of your impure sample 90,8-106.8 °c (range) la. Based on the melting point of your crude sample, what can you say about its purity? Explain. 1b. What effect does the presence of the following impurity have on the melting point of a sample: i) the impurity is maleic acid ii) the impurity is charcoal (an insoluble impurity)
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- how to analyse alkaloids using Acid dye colorimetry method and HPLC method? Discuss atleast 5 sentences eachAn organic lab student carried out the reaction of methylmagnesium iodide with acetone(CH3COCH3), followed by hydrolysis. During the distillation to isolate the product, she forgot to mark the vials she usedto collect the fractions. She turned in a product of formula C4H10O that boiled at 35 °C. The IR spectrum showed onlya weak O¬H stretch around 3300 cm-1, and the mass spectrum showed a base peak at m>z 59. The NMR spectrumshowed a quartet (J = 7 Hz) of area 2 at d 3.5 and a triplet (J = 7 Hz) of area 3 at d 1.3. Propose a structure for thisproduct, explain how it corresponds to the observed spectra, and suggest how the student isolated this compound.3.0cm³ of redistilled sebacoyl chloride was obtained (density =1.12gcm-3).And dissolved in 50cm³ of dry dichloromethame . 2.2g of diaminohexane was dissolved in 25cm³ of water . 1. Calculate the molar ragione of diamine to acid chloride used 2 .This time using 1.6g of diaminohexane ,calculate the new molar ratio
- Propose a reasonable Phase I and a Phase II metabolite for the followingA 5.00-mL aliquot of a solution that contains 3.05 ppm Ni2+ is treated with an appropriate excess of 2,3-quinoxalinedithiol and diluted to 50.0 mL. The molar absorptivity of a Ni2+- 2,3-quinoxalinedithiol solution at 510 nm is 5520 L mol-1 cm-1. What is the absorbance of the above diluted Ni2+- 2,3-quinoxalinedithiol solution at 510 nm in a 1.00-cm cell?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.
- Describe how the product is purified. 4,4'-DIBROMOBIPHENYL [Biphenyl, 4,4'-dibromo-] Submitted by Robert E. Buckles and Norris G. Wheeler1. Checked by R. S. Schreiber, Wm. Bradley Reid, Jr., and Robert W. Jackson. 1. Procedure In a 15-cm. evaporating dish is placed 15.4 g. (0.10 mole) of finely powdered biphenyl (Note 1). The dish is set on a porcelain rack in a 30-cm. desiccator with a 10-cm. evaporating dish under the rack containing 39 g. (12 ml., 0.24 mole) of bromine. The desiccator is closed, but a very small opening is provided for the escape of hydrogen bromide (Note 2). The biphenyl is left in contact with the bromine vapor for 8 hours (or overnight). The orange solid is then removed from the desiccator and allowed to stand in the air under a hood for at least 4 hours (Note 3). At this point, the product weighs about 30 g. and has a melting point in the neighborhood of 152°. The crude 4,4'-dibromobiphenyl is dissolved in 75 ml. of benzene, filtered, and cooled to 15°. The…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?WILL HEXANE DISSOLVE fenethylline IN GC-MS?
- please provide the machanisms of 1a, 1e, 1fThe 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?After the reduction of camphor with NaBH4 experiment, you took a 1H-NMR of your product sample. The sample ave the following 1H-NMR singlas with the given integrations (2.314 and 9.497). Determine the product ratio of isoboreneol to borneol in this particular mixture.