▪ In a blood alcohol analysis by GC-FID, methanol elutes at 1 min, ethanol at 2 min, IPA at 3 min, and IS at 4 min. In the patient sample, the analyte elutes t 2 min and the IS at 8 min. What is the relative retention time and the analyte in the patient? ▪ A) methanol ▪ B) Ethanol B C) IPA
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- Formulate a hypothesis regarding the solubility of aspirin at different pH. The experiment A) Three teaspoons of water (approx. 15 ml) were added to one tablet said to contain 300 mg of aspirin. Fizzing was observed. Most of the tablet dissolved, but there were some solid particles. By heating the mug in a microwave for 10 second increments until the water came to the boil (approx. 3x), all of the solid partides dissolved. The solution was left to cool to room temperature and then placed in a fridge and NOTHING HAPPENED. Try this yourself if you can spare two aspirin tablets, your results might look different. Questions to ask: 1. What might the fizzing bubbles be? 2. Can you give a chemical explanation? 3. Can you write a chemical reaction equation with aspirin reacting with something to give a gas and aspirin in another form? 4. What might be the formulation (what the manufacturer mixes with aspirin in making the tablet) "trick" for aspirin to improve solubility? 5. How does this…10-27. A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 g of water. Then 4.373 g of solution were titrated with 14.22 mL of 0.106 3 M HCl to reach a bromocresol green end point. (a) What fraction of the 10.231-g sample of window cleaner is contained in the 4.373 g that were analyzed? (b) How many grams of NH3 (FM 17.031) were in the 4.373-g sample? (c) Find the weight percent of NH3 in the cleaner.1. You begin by measuring 10.00 mg of dye on a precise analytical balance and dissolve the dye in 1.000 1 of water having density 998.25 kg/m³. What is the concentration of the dye in mg/l, kg/m³, mg/kg, and ppm?
- 1.10 M Acetic acid 0.900 M Sodium acetate [H30*1 (M) Solution (mL) |(mL) 1 8.00 2.00 8.71e-5M 2 7.00 3.00 5.13e-5M 6.00 4.00 3.24e-5M 4 5.00 5.00 2.17e-5 5 4.00 6.00 1.45e-5M 6. 3.00 7.00 9.31e-6M 7 2.00 8.00 1.00 9.00 00How many mL of 0.779 M HNO3 are needed to dissolve 5.15 g of BaCO3? esc 1 F1 AAB 2 Q *** F2 W # 3 80 F3 E $ 4 000 000 F4 2HNO3(aq) + BaCO3(s) Ba(NO3)2(aq) + H₂O(l) + CO₂(g) R Cengage Learning | Cengage Technical Support % er oo 5 F5 MacBook Pro T A 6 F6 & 7 Y F7 mL * DII U F8 8 DO 9 1A stock solution of approximately 7.7x10^-5 molar will be provided in lab. Determine the volumes of each solution needed to prepare 50.00 mL of standard solutions of concentration 0.600x10^-5molar, 1.20x10^-5molar, 2.40x10^-5molar, and 3.00x10^-5molar. Round the calculated volumes to thenearest 0.1mL.
- The sample containing 4.2 % NaCl will be determined gravimetrically as AgCl. What weight (in milligrams) of the sample must be taken to obtain a precipitate that will weigh about 0.39 mg? FM: NaCl = 58.44 AgCl = 143.3 %3D Answer in two decimal places. Do not include units in the answer. Answer:A drug is ordered to be administered IV at the initial rate of 4 mU/min, and may increase by 2 mu/min q 15 min to a max of 10 mU/min. The IV strength is 5 mU/mL. Construct the first two lines of the titration table for this order. O A. Dose Rate (mU/min) IV rate (mL/h) 4 mU/min (initial) 8 mU/min 36 mL/h 48 mL/h O B. Dose Rate (mU/min) 4 mU/min (initial) 6 mU/min Oc. Dose Rate (mU/min) 4 mU/min (initial) 6 mU/min O D. Dose Rate (mu/min) 4 mU/min (initial) 6 mu/min IV rate (mL/h) 24 mL/h 48 mL/h IV rate (mL/h) 48 mL/h 72 mL/h IV rate (mL/h) 36 mL/h 36 mL/hThe concentration of the "A" solution of propanol is 3.0×10-3 M, using GC method, the height of this peak is 12750 unit. The concentration of etanol in a "B" solution is 7.5×10-3 M, using the same GC method, the height of the peak is 16100 unit in this case. Calculate the concentration and the peak of the compounds, if the mixture of 4 ml A and 6 ml B solution was injected!
- -2 The PPm Concentration of 4.5 *la M Solution off Lif is I1940fやPm D 196. PPm 3 1950 PPmMODULE Science 7 eldsT Q1. So how many table spoons of sugar have you added until the sugal is no longer dissolved.? This is now the maximum amount of sugar that will completely dissolve in a half glass of water. What do you think is the a to solution formed? 7/06 Answer: Q2. Now that you have reached the saturation point, what is your evidence that the solution is saturated? Answer: Q3. What is your conclusion about a saturated solution? Answer: AG School lor 8.Concentration of the KSCN stock solution, M Volume of the KSCN stock solution, mL Initial molar concentration of SCN in a 50-ml flask, M PART A. Establishing the Beer's Law Coefficient: blank 0 0 solution 2 1.00×10-³ 2.00 solution 3 1.00×10-3 5.00 solution 4 1.00×10-³ 10.00 solution 5 1.00-10-3 15.00