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You mixed 5 g of active ingredient with 75 g of ointment. Rounding to the hundredth position, what is the weight/weight concentration of the mixture?
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- 2 ml 1 ml 1 ml 1 ml 1 ml STOCK solution colored- dye bottle 1 mg/ml A B C D E Volume of water 4ml 4ml 4ml 4ml Dilution ratio Dilution factor Final Concentration 1) What type of Serial dilution is this one ( ?? :?? dilution)?Solution 1 is diluted by adding 519 microliters of Solution 1 to 5 mL of Solution 2. What is the dilution of Solution 1? Report your answer in standard decimal notation rounded to 2 decimal places. Include trailing zeros so that two decimal points are reported. For example, 500 μL added to 5 mL would be a 0.09 dilution or 50 μL added to 4.5 mL would be a 0.10 dilution.A chemist mixes 34.9 g of diethyl ether with 52.1 g of 2-ethyltoluene and 9.03 g of butanoic acid. Calculate the percent by mass of each component of this solution. Be sure each of your answer entries has the correct number of significant digits. component mass percent diethyl ether 2-ethyltoluene 0% 0% butanoic acid
- 30 20 10 From the procedure 2. Assemble the simple distillation apparatus as generally shown in Figure SD.1 in the lab manual, ensuring that the thermometer bulb is aligned at, or slightly below, the Y in the distillation head. Each ground joint is greased by putting three or four stripes of grease lengthwise around the male joint and pressing the joint firmly into the other without twisting. 3. Attach a water condenser to the distillation head. 4. Remember, water goes in the bottom and out the top. Attach a clamp holder to the end of the drain tube to keep it weighted in the drain. Turn water to a trickle. If it is slowly draining, it is high enough. Begin a low flow of water through the condenser. 5. Place the set up on a heating/stir plate. 6. Turn on the hot plate to start heating the solution. Monitor the temperature and the boiling of the solution throughout the distillation process. 7. Record the temperature of the distillate when the first drops are recovered. 30.0 8. Adjust…If a total of 125 mL of a 10% solution is diluted to 500 mL in a 500-mL volumetric flask, what is the concentration of the resulting new solution? You are asked to make a 1/2 dilution using 1.5 mL of serum. How much diluent do you need to use? If you make a five-tube twofold dilution using 2 mL of serum, what is the concentration of serum in tube #4?You are diluting down a solution by mixing it with water. You start with a ‘stock concentration’ of 20g/mL. We want to make up a ‘working solution’ 500 mL at 3 g/mL. How much stock and how much water?
- Pipet (1.0x10^1) mL of a sample solution into a 250.00 mL volumetric flask and dilute to the mark with distilled water. Then, pipet 2 mL of this diluted solution into a 50.00 mL volumetric flask and dilute to the mark with distilled water. What is the dilution factor of the final solution? (Note: keep one decimal in your answer.)Today the only form of liquid acetaminophen on the market has a concentration of 160 mg acetaminophen per 5.0 mL. How would you instruct parents of an infant to give a total of 40 mg of acetaminophen to their infant? Your directions should be clear, not lead to the confusion caused by the physician in the case study, and include the volume of liquid acetaminophen they should give their son. Please show how you calculated the volume needed to provide 40 mg of acetaminophen.Refill the burette with the standardized 0.5 M NaOH solution provided. Record the initial volume of NaOH in your notebook. Dispense a 10.00 mL aliquot of vinegar into a clean, dry 150 mL beaker (do not pipet directly from the bottle). Dilute this aliquot with exactly 75.0 mL of distilled water. Add 10 drops of phenolphthalein solution. a) Determine the mass of Acetic Acid in the Vinegar solution for each of the three trials in the titration procedure. Average the results. b) Determine the mass of the vinegar solution used for each titration. The density of vinegar is about 1.005 g/mL. c) Determine the Percentage Acetic Acid in the Vinegar.
- 0.5 mg/0.25 mg • 1ml =A chemist mixes 28.4 g of acetone with 60.1 g of 4-methyl-2-pentanone and 4.31 g of methanol. Calculate the percent by mass of each component of this solution. Be sure each of your answer entries has the correct number of significant digits. component acetone 4-methyl-2-pentanone methanol mass percent Ï% 0 п% % ☐ x10 XPart 1: A solution of sulfuric acid was made by dissolving 20.0g of 98% sulfuric acid in 250mL of water. (H2SO4 = 98.078 g/mol; H2O = 18.015 g/mol)Answer these items 1-4 for part 1:1. Express the concentration of this solution in % by weight. Additional information for items 2-3: What if the solution has a total volume of 262mL?2. Express the concentration in molarity3. Express the concentration in normality4. Express the concentration in molality Part 2: An alcohol, Ethanol (C2H5OH), is present in 1L of wine that is 12% alcohol by volume. The density of the solution is 0.984 g/mL, and the density of pure alcohol is 0.789 g/mL. (C2H5OH = 46.07 g/mol)Answer these items 1-2 for part 2:1. What is the weight of the alcohol present in wine?2. What is the molarity of the solution?