Q: Using the empiric method of Lemke, predict the water solubility for each of the following mol ecules…
A: Aspirin : It has a limited solubility in water, which amounts to 2–4 mg/mL and its solubility varies…
Q: Give at least three characteristics of chloroform that make it a good extracting solvent for the…
A: In nature alkaloids are found either as acidic salts or free bases.
Q: You have been given a mixture of lysine of isoelectric point of 9.74, Histidine of isoelectric point…
A: The given Isoelectric point is the pH of an amino acid at which it has no net electric charge.…
Q: How to calculate the percentage haemolytic in RBC suspension
A: To calculate the% of haemolytic in RBC is (100 - Hct) × plasma Hemoglobin (g dl -1) / Total Hb (g…
Q: Calculate the equilibrium concentration of undissociated CH3 CHOHCOOH in a lactic acid solution with…
A:
Q: A mixture of compounds is dissolved in ether, and extracted with 10% NaHCO3 solution. The aqueous…
A: If the mixture contain amines, then it will be at the bottom layer of second extraction.
Q: 9. How do you know if a malenimide based reagent will conjugate to nitrogen or sulphur in an amino…
A: we can identify the malenimide based reagent as amino acids by looking at the following - amino…
Q: How does the pKe of the conjugate acid of benzylamine (CgH5CH,NH2) compare to the pk,'s of the…
A: pKa is inversely proportional to acidity strength. A more acidic molecule will have lower pKa value.…
Q: Using this info, please calculate two theoretical yields for (1) p-acetamidobenzenesulfonamide and…
A:
Q: How Tightly Do Transition-State Analogs Bind to the ActiveSite?
A: Enzymes are made up of protein and act as catalysts for biological systems. The active site of the…
Q: The dissociation constant of ethanolamine is 2.77 x 10 – 5 at 25 °C. Calculate its pKb value.
A: Given data: The dissociation constant of ethanolamine = 2.77 x 10 – 5. To find: The pKb value.…
Q: If you have 1L of 1M Lys-Ser at its pI, how many moles of NaOH would be required to convert it to…
A: 1 L of 1 M Lys-Ser would contain 1 mol of Lys-Ser. The structure of Lys-Ser is:
Q: Explain what will happen to the (i) yield and (ii) purity, of aspirin if the following steps were…
A: The functional group is a key component associated with the molecule that transforms the molecule…
Q: Write down the process scheme followed in caffeine isolation.
A: Isolation process
Q: Write the Mechraism& productsS for: H30
A: In organic chemistry, the acid hydrolysis of imine leads to the formation of the corresponding…
Q: The activity of sulphonamides is decreased if they are taken at the same time as procaine. Suggest…
A: The activity of sulphonamides is decreased if they are taken at the same time as procaine.…
Q: 2. At about 26,000 feet, if the partial pressure of oxygen is about 30 torr, what is the fractional…
A: given: partial pressure of O2 = 30 torr P50 = 26 Hill coefficient of hemoglobin n = 3 fractional…
Q: For acetate with a pKa of roughly 4.2, what is a lowest pH where this molecule could serve as a good…
A: Given the pKa value of the buffer, pKa = 4.2 According to Henderson equation: pH = pKa + log[A-][HA]
Q: 2. In step 1 of the procedure we will use 10 mL of cold water (20 °C ) to dissolve the salt. Will…
A: Solubility of organic compounds in water: Like dissolves like
Q: Discuss the shape of micelles after c.m.c. with increasing amphiphile concentration.
A: Amphiphiles are synthetic or natural molecules with the ability to self-assemble into a wide variety…
Q: Sulfuric acid (H2SO4) is a strong acid in aqueous solution, yet the pKa of sulfuric acid is 7.6 in…
A:
Q: In the preparation of a standard stock solution for protein analysis, 50 mg of bovine serum albumin…
A: Mass of BSA in 10mL solution = 50mg
Q: You have an unusual order for intravitreal ceftazidime 2.25mg/0.1 ml. Your pharmacy has ceftazidine…
A: Dilution equation is: c1v1=c2v2…
Q: Here is a flowchart for the separation of a mixture of a primary aliphatic amine (RNH, pK, 10.8), a…
A: In this question, we have to find out the correct answer of given problem by the help of the…
Q: Discuss what this data indicates about the polarity of Methyl-4-Aminobenzoate
A: Since you have asked multiple questions, we will solve first one for you. For remaining question,…
Q: Identify and name the likely cofactors and enzymes responsible for this Phase 2 transformation.
A:
Q: 5. The safonification of ethyl acetate in sodium hydroxide solution at 30^oC CH3COOC2H5 + NaOH…
A: Saponification of an ester in acidic and basic medium follows different order kinetics. Given is the…
Q: To synthesize Tylenol, p-aminophenol will be acetylated using 1.4 equivalents of acetic anhydride.…
A: Given: Mass of p-aminophenol = 2.1 g In order to synthesize, Tylenol, p-aminophenol will be…
Q: According to Marais et al. (2003), what are the advantages and precautions of using Ac-Di-Sol® as…
A: Ac-Di-sol, the best known superdisintegrant, is crosslinked sodium carboxymethylcellulose or…
Q: Calculate the pH of 1.25x10^-2 M of the decongestantephedrine hydrochloride if the pKb of ephedrine…
A: Ka value is calculated.
Q: 3. Why did a mixture of 2.00 mL of pH 7.00 phosphate buffer, 0.900 mL of deionized water and 0.100…
A: 3. p-nitrophenyl acetate? in solution yields a light yellow to yellow solution?. This has a…
Q: 5. The pKas of chemicals HX and HY are 5.0 and 7.0 respectively. The pKa of carbonic acid H,CO, is…
A: Extraction is the transfer of component from one layer to another
Q: In what way(s) might the results of the separation and purification procedure outlined be different…
A: The carboxylic acids are weak acids and they dissociate feebly in water to furnish the hydrogen…
Q: If you have 1L of 1M Lys-Ser at its pl, how many moles of NaOH would be required to convert it to…
A:
Q: As long as the pH is not less than ___________, at least 50% of a protonated amine with a pKa value…
A: Let RNH3+ be the protonated amine which is in acidic form with pKa value of 10.4. According to the…
Q: 1. A vial containing an unknown sample is suspected to be one of the following compounds (mp.): urea…
A: A vial consists of an unknown organic compounds which can be urea, 2,4-dimethylacetanilide,…
Q: what is prefromulation steps of phenylbutazone ?with illustration?
A: The stage of the development during which physiological properties of a drug substance are…
Q: Here is a flowchart for the separation of a mixture of a primary aliphatic amine (RNH, pK, 10.8), a…
A: The given mixture contains amine, carboxylic acid and phenol. All these are soluble in diethyl ether…
Q: A solution of two diastereomers contains 88.6% of (3S,4S)-tert-butyl-3-amino-4-…
A:
Q: pon screening with TLC (made of silica gel) chromatography using hexane/chloroform (3:1) as eluting…
A: The components on the chromatography paper moves according to their polarity. The spot of the most…
Q: Q4. Prednisolone is to be eluted from a silica gel column. List the following system in order of…
A: The order of elution of prednisolone is needed to be predict in different mixture of solvent given.
Q: What is the changes in TZDs (specifically pioglitazone) structure that has direct impact in clinical…
A: The thiazolidinediones are TZDs or glitazones belong to a class of antidiabetic drugs and improve…
Q: 3) Explain in a few short sentences how IMFS, acid/base reactions, equilibrium, and thermodynamics…
A: Ibuprofen is non steroidal anti-inflammatory drug. It is also used as an important antipyretic and…
Q: How organocuprate reagents (R2CuLi) are prepared ?
A: Organocuprates ("Gilman Reagents") have the general structure R2CuLi, where R is a carbon group.
Q: Beta-sitosteral Cholesterol Campesterel Stigmaste Brassicasterol Ergosterol 16.5 17.0 17.5 18.0 18.5…
A: The answer is as follows:
Q: Why is the pKa value of protonated hydroxylamine (6.0) so much lower than the pKa value of a…
A: The pKa value of hydroxylamine and methyl amine is shown below:
Q: According to the literature, when the product Amevive (alefacept) is reconstituted with sterile…
A: Given, mass of alefacept in 0.5 mL = 7.5 mg volume contained in each vial = 0.5 mL…
Calculate k, the degradation rate constant, responsible for drug degradation in this solution (in month-1).
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images
- Time(s) [X3] (mole/L) 0 0.600 500 0.481 1000 0.392 1500 0.336 2000 0.273 2500 0.230 3000 0.181 3500 0.156 4000 0.120 4500 0.106 5000 0.072 plot ln[X3] vs time plot 1/[X3] vs. timeSign in to edit and save changes to this file. 1. 121 49ln→ 121 + "5oSn 2. 8Be → 2_ 3. 1°4BE → °1B + 4. 8437Rb → °+1e + 128 128 5. 55CS→ 54Xe 6. 131m "s6Ba → oy + 7. 23793Np →42HE + ...In an experiment with an Ostwald Viscometer, the times of flow of water and toluene are 45 s and 32.9 s respectively at 30°C. The density of water is 1.002 g/cc. Calculate the density of the toluene in g/ml. (µwater = 0.8916 %3D cP, utoluene = 0.5239 cP) Use 4 decimal places. 0.8853 0.8053 O 0.8080 O 0.8882
- Trial [I0:] [HSO: ] Time Rate [HSO3 ]/time 1 49 25 3 16.9 Table-2 Find the concentrations of [IO3] and [HSO3] and enter into the table. Divide the concentration of HSO3 with the time in seconds to get the rate. Volume is assumed to be additive in this experiment. Thus, the total volume of all the solutins is assumed to be 20.0 mL. This introduces a small error that can be considered insignicant. The concentrations of IO; and HSO, (after mixing but before the reaction begins) can be calculated using the relationship: Mailute Vdilute= Mcone Vcone. A sample calculation is shown below for the concentration of IO, in Trial 1: Mailute to be calculated Vdilue 20.0 mL 0.020 M x 2.0 mL Mcone 0.020M V conc 2.0 mL %3D diluted [IO, ] = = 0.0020 M IO, %3D 20.0 mL Similarly, the concentration of HSO; in Trial 1 is calculated thus: 0.010 M x 2.0 mL diluted [HSO, ] =0.0010 M HSO, 20.0 mLIn a study of the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 CH 3 NC(g) CH 3 CN(g) the concentration of CH 3 NC was followed as a function of time It was found that a graph of ln[CH 3 NC] versus time in seconds gave a straight line with a slope of - 4.17 * 10 ^ - 3 * s ^ - 1 and a y intercept of -4.05 Based on this plot , the reaction is order in CH 3 NC and the rate constant for the reaction isЗа. Bromine and methanoic acid react in aqueous solution. Br, (aq) + HCO0Н (ад) — 2Br (aq) + 2H" (аq) + Со, (g) The reaction was monitored by measuring the volume of carbon dioxide produced as time progressed. o 5 10 15 20 25 [Source: © International Baccalaureate Organization 2019] 30 20 40 60 80 100 120 140 160 Time / s [Source: © International Baccalaureate Organization 2019] Determine from the graph the rate of reaction at 20 s, in cm³ s1, showing your working. 3b. Outline, with a reason, another property that could be monitored to measure the rate of this reaction. 3c. Describe one systematic error associated with the use of the gas syringe, and how the error affects the calculated rate. 3d. Identify one error associated with the use of an accurate stopwatch. Volume of carbon dioxide / cm T m mm mo
- . Complete the following table. Time (minutes) 0 2 4 6 8 10 Concentration of crystal violet, [R] 7.02 x 10-6 5.42 x 10-6 4.22 x 10-6 3.25 x 10-6 2.41 x 10-6 1.84 x 10-6 In [R+] Prepare three graphs using the attached graph paper: i) plot [R] (y-axis) versus time, ii) plot In[R] versus time, and iii) plot 1/[R+] versus time. How do these three plots differ? Which is the most linear? 1/[R+]Please answer questions 4a, 4b, and 4c. The questions are provided in the attached image. Thank you.You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.
- Drug Concentration A pharmaceutical companyclaims that the concentration of a drug in a patient’sbloodstream will be at least 10% for 8 hours. Supposeclinical tests show that the concentration of a drug (aspercent) t hours after injection is given byC(t) = 200t/2t2 + 32During what time period is the concentration at least10%? Is the company’s claim supported by the evidence?In a study of the conversion of methyl isonitrile to acetonitrile in the gas phase at 250 °C CH3NC(g) CH3CN(g) the concentration of CH3NC was followed as a function of time. It was found that a graph of In[CH3NC] versus time in seconds gave a straight line with a slope of -4.20×10s and a y-intercept of -2.27 . Based on this plot, the reaction is vJorder in CH3NC and the rate constant for the reaction isAlabama Instruments Company has set up a production line to manufacture a new calculator. The rate of production of these calculators after t weeks is dx 180 dt (t + 24)2 calculators per week. Production approaches 5,700 per week as time goes on, but the initial production is lower because of the workers' unfamiliarity with the new techniques. Find the number of calculators produced from the beginning of the third week to the end of the fourth week. Round the answer to the nearest integer. а. 8281 b. 8781 c. 8881 d. 8681 е. 8581