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ANES 500 Chapter 8 Assignment Name: __________________ Due 11:30 pm on 11/01/2021 Fall 2021_2022 Grade__________ General Instructions Provide suitable responses for the problems shown below. The assignment is to be completed individually and returned by 11:30 pm EDT on Monday, November 1, 2021. Where applicable, show your work to receive full credit. Late assignments will be assessed a penalty of 10 % of the overall grade per day late. How to Return This Assignment You may upload the document to the drop box in Canvas as a Word file, a pdf file, a jpeg file, a scanned file, etc. The document may also be returned as an email attachment in canvas. If the file is too large, try compressing it using free services such as wecompress.com. Do not return the file using our outlook email. For those who save each page of the assignment as a pdf or image file, you may combine them into one document as follows: • Locate the files in Windows File Explorer. • Right click on the first file. • Choose “Combine Supported Files in Acrobat…” A new dialog box will pop up, but you may have to minimize other files to see it. • Drag the files from Explorer into this box. • If necessary, change the order of the files using “Move Up” or “Move Down.” • Click on “Combine Files.” You will be prompted for a file name. If applicable, you may also copy and paste images in a Word document, and then save the document as a pdf file. Instructions for writing or type on a pdf document will be sent to you as a separate document. Please ensure that your work is legible and your file is complete before and after sending. ANES 500 Chapter 8 Assignment Name: __________________ Due 11:30 pm on 11/01/2021 Fall 2021_2022 Grade__________ 1. Consider the contents of Flasks I – IV when answering questions 2(a) to 2(e). Flask I contains a glucose solution. Flasks II and III contain pure water. Flask IV contains a red blood cell suspended in a saline solution of unknown concentration. (5 Pts) (a) If Flask I and Flask II were heated equally, which liquid will boil first? (b) If Flask I and Flask II were heated to 50 oC, which flask, if any, would have the lower vapor pressure? (c) If Flask I and Flask III were placed in a freezer, which liquid will freeze first? (d) If the temperature in Flask I is 10 oC higher than in Flask III, which flask will have the higher vapor pressure? (e) Is the solution in Flask IV isotonic, hypertonic, or hypotonic? The arrows indicate the net movement of water. 2. Decide whether the following statements are true (T) or false (F): (6 pts) (a) Colligative properties depend on the number of molecules present, not on the kind of molecules used. (b) Under identical conditions, the vapor pressure of a solution is expected to be higher than that of the pure solvent from which it is made. (c) Adding a nonvolatile solute to a pure solvent will decrease its freezing point. (d) Adding a nonvolatile solute to a pure solvent will increase its vapor pressure. (e) Adding a nonvolatile solute to a pure solvent will increase its boiling point. (f) Osmotic pressure is not a colligative property and has no dependence on solute concentration. 3. The allowable concentration of lead in drinking water is 0.0015 mg per 100 grams. (a) What is this concentration in parts per million (ppm)? (b) What is this concentration in parts per billion (ppb)? (c) In some countries, the allowable concentration of manganese in water is 0.0500 ppm. What is this concentration in mg per 100 grams? (6 pts) 4. A solution is prepared by dissolving 1.25 gram of KCl in enough water to give 275 mL of solution. (a) How many moles of KCl are in the solution? (b) How many millimoles of KCl are in the solution? (c) What is the molarity of the solution? Show your work and report your answers to 3 significant figures. (6 pts) 5. Calculate the percent concentration (w/v) of KCl in the previous problem. Show your work and report your answers to 3 significant figures. (4 pts) 6. How many grams of glucose are there in 775 milliliters of a 15% (w/v) glucose solution? Show your work and report your answers to 3 significant figures. (4 pts) 7. A reaction calls for 0.311 mole of glucose. (a) Calculate the mass of glucose that is required for this reaction. (b) If the available glucose solution has a molarity of 2.50 mole/liter (2.50 Molar), how many milliliters of this solution will be needed to supply the 0.311 mole of glucose? Show your work and report your answers to 3 significant figures. (6 pts) 7. A solution contains 0.130 mole CaCl2, 0.275 mole of NaCl, and 0.250 mole of MgCl2, how many mEq of each ion are in the solution? Show your work and report your answers to 3 significant figures. (6 pts) 8. A solution is prepared by dissolving 5.50 grams of MgCl2 in enough water to give 375 mL of solution. Calculate (a) the molarity and (b) the normality of the solution. Show your work and report your answers to 3 significant figures. (6 pts) 9. How many grams of KCl are needed to prepare 255 mL of a 1.13 % KCl solution (w/v)? Show your work and report your answers to 3 significant figures. (4 pts) 10. A solution contains 0.25% (w/v) Xanax. (a) What is its concentration in mg/cc? How many milligrams of Xanax can be obtained from 3.00 cc of this solution? Show your work and report your answers to 2 significant figures. (5 pts) 11. (a) A solution is labeled 1:90,000. (a) Determine the dosage equivalence in mg/cc. (b) What is the dosage equivalence in percent concentration? (c) How many milligrams of the medication are in 10.0 cc of this solution? Show your work and report your answers to 3 significant figures. (6 pts) 12. Calculate the molality of a KCl solution that contains 5.52 grams of KCl in a total of 112 grams of solution. Show your work and report your answer to 3 significant figures. (5 pts) 13. Calculate solubility of CO2 in water at 25.0 oC if its partial pressure is 3.20 atm. Assume kH for CO2 is 3.10 x 10-2 mole/(L.atm). Show your work and report your answer to 3 significant figures. (5 pts) 14. A solution is prepared by dissolving 21.5 grams of glucose to a total volume of 0.250 L. (a) What is the molarity of the solution? (b) If the temperature of the solution is 25.0 oC, what is its osmotic pressure? π = MRT. R = 0.08206 L.atm/K.mole. Show your work and report your answers to 3 significant figures. (5 pts)

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