Once you calculate KD (KD is 4.0 g/ml), calculate how much compound would be extracted by mixing 5.0 g of compound X in 100 mL of water and combining with 100 mL of diethyl ether. Compare your results with other groups.
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Once you calculate KD (KD is 4.0 g/ml), calculate how much compound would be extracted by mixing 5.0 g of compound X in 100 mL of water and combining with 100 mL of diethyl ether. Compare your results with other groups.
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- Answer questions a through c: a. A CHEM 1215L student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate KHC8H4O4, NOT potassium hydrogen phosphorus!) b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phe- nolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar. c. Calculate the mass percent of acetic acid, HC2H3O2 (aq), in the vinegar using the mo- lar concentration for acetic acid, HC2H3O2 (aq), determined in part band assuming the density of the solution is 1.01 g/mL.A mixture of ethanol, benzaldehyde and KMnO4 is mixed together. Would you expect a precipitate to form based on the reactants functional groups?Multiple choice questions. Pick the right answers Benzene is one of the Toxic Air Pollutants (TAPS) found in car exhaust fumes When a 50.00 ml. aqueous sample containing a 0.05000 M benzene (molecular weight = 78.11g/mol) is extracted twice with 10 00 ml. portions of chloroform, it is found that 1.50x 10 moles of the original compound has been extracted into the chloroform i) Calculate the value of the partition coefficient for the extraction of benzene in water using chloroform A 2.75 B 2.91 C 7.51 D 2.81 ii) determine the extraction efficiency of a single extraction A. 0.575 B. 0.400 C. 0.368 D. 0.600 iii) determine the total volume of the chloroform which will be needed to extract 99% of the benzene from the aqueous phase A 50.72 mL B 150 00 mL C 110 00 mL D 46.28 mL.
- 5. If the concentrated phosphoric acid (H3PO4) is 15.2 M, determine the molar ratio of H3PO4 to cyclohexanol, if one used 9.13 g of cyclohexanol and 4.0 mL of H3PO4. Show your calculations. Was cyclohexanol or H3PO4 the limiting reagent? Briefly explain.Describe how you would make 1L of the following solution using the stocks given below. Please include how much of each stock you will use, as well as how much water you will add to the solution at the end. Stocks: Acrylamide powder Desired final solution:15% acrylamide (w/v)3. Standard white vinegar you can buy in the grocery store is 5% concentration. That means 5% of the liquid vinegar is acetic acid and 95% of the solution is water. In a hardware store, you can buy industrial strength vinegar, which is 30% concentration. This means that 30%% of the vinegar is acetic acid, and the remaining 70% is water. Samuel does another experiment, this time with 5% vinegar and 30% vinegar. He sets up two science fair volcanoes (in no particular order), each with the same temperature, mass of baking soda and volume of vinegar. But one volcano uses 5% vinegar and the other volcano uses 30% vinegar. He measures the volume of gas production for the first minute of each reaction, and he records the data below. Volcano # 1 Volume of gas produced (ml.) vs. Time (s) for Volcano #1 Volume of gas produced (mL) Time (s) 60 E 50 10 25 40 20 38 30 40 46 50 30 20 • Volume of gas produced (ml.) 50 52 53 10 60 20 40 60 80 Time (s) Volcano # 2 Volume of gas Volume of gas produced…
- 5. Indigo is a blue dye: H H H H. =C 'N. H H H H H a) Draw the line structure for indigo. b) Place an asterisk next to any chiral carbon atoms in your structure (if there are any). Explain your choice in 1-2 sentences. c) Label all of the functional groups in your indigo molecule. d) If you were trying to use titration to quantify the amount of indigo in a sample, would you use HCl or NaOH as your titrant? Explain your answer in 1-2 sentences. e) Roughly sketch the titration curve that would result from the analysis in part d. Don't forget to label your axes and any important points on the curve.3. What is the major obstacle that fractional distillation overcomes? 1 1° in422 male distillatio1. Explain how distillation works in separating simple mixtures. 2. Differentiate simple distillation and fractional distillation. 3. What is an effective way of preventing irregular ebullition or bumping of the mixture during distillation?
- 3. Standard white vinegar you can buy in the grocery store is 5% concentration. That means 5% of the liquid vinegar is acetic acid and 95% of the solutioni is water. In a hardware store, you can buy industrial strength vinegar, which is 30% concentration. This means that 30% of the vinegar is acetic acid, and the remaining 70% is water. Samuel does another experiment, this time with 5% vinegar and 30% vinegar. He sets up two science fair volcanoes (in no particular order), each with the same temperature, mass of baking soda and volume of vinegar. But one volcano uses 5% vinegar and the other volcano uses 30% vinegar. He measures the volume of gas production for the'first minute of each reaction, and he records the data below. Volcano # 1 Volume of gas produced (m) vs Time (s) for Volcano t Time (s) Volume of gas produced (mL) 10 25 38 40 20 30 46 30 Volume of gas produced (ml) 50 40 50 52 60 53 40 Time ( 20 60 Volcano 2 Volume of gas produced iml) vs. Time is) for Vocano 2 Volume of…beer. A 2.39- mg sample of safrole was dissolved in 103.0 mg of diphenyl ether. The solution had a melting point of 25.70°C. Calculate the molecular weight of safrole. The freezing point of pure diphenyl ether is 26.84°C, and the freezing- point- depression constant, Kf, is 8.00°C/m.3. When solid sodium bicarbonate and solid hydrochloric acid were mixed together, no change was observed. When water was added to the solid mixture, bubbles formed. Explain these results.
