Class Activities

1. Make 1800 mL of a 50% weight/weight acetone alcohol solution. Specific gravity acetone: 0.786 Specific gravity alcohol: 0.810 2. Calculate the dilution using 0.5 mL of urine and 8.5 mL of isotonic saline. 3. Calculate the dilution of 0.1 mL serum in 0.9 mL water.

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4. Indicate the compartment (A or B) that will increase in volume for each of the following pairs of solutions separated by a semipermeable membrane: Solution A a. 10% (m/v) starch b. 2%(m/v) albumin c. 8% (m/v) sucrose Solution B a. 10% (m/v) NaCl b. 2% (m/v) glucose c. H₂O d. 5%(m/v) glucose 4%(m/v) starch 5%(m/v) albumin 0.8% (m/v) sucrose 5. Indicate whether a red blood cell will undergo hemolysis, crenation, or no change in each of the following:

Drinking too much plain water in a short period of time can result in water intoxication. As a result, blood plasma will become hypotonic. What effect do you think this would have on blood cells?  Cells will be crenated. Cells may be lysed. Cells will be plasmolyzed. Cells will not change.

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Let’s say you have a 75% sugar solution… You want: 100mls of 35% solution.  How much stock, how much diluent?

number 15 (POST) please answer A&B ! thank you!

Rank the following aqueous solution by increasing boiling point. (1) 0.10 m NaCl (2) 0.10 m Al(NO3)3 (3) 0.30 m C12H₂22011 (sucrose) Instruction: Type in (1), (2) or (3) in each answer box below. Lowest 1 Highest

In the order: Add 30 mEq to calcium gluconate to 1L D5 1/4NS. 1) How many ml of calcium gluconate 15% w/v injection should be used to prepare this IV order? 2) Assuming volumes are additive and complete dissociation, what would be the osmolarity of the IV admixture solution? (Consider total volume after adding the volume of calcium gluconate.)

Time's Up! A solution is made using 117.9 g of dimethyl ether (MM = 46.07 g/mol) and 90.0 g of methanol (MM = 32.04 g/mol). What is the mole fraction of the dimethyl ether in the solution? %3D

Using both images attached please do the calculations in the image attached Please also do calculations for: 1) mol solute 2) kg solvent 3) m solution 4) Freezing Point Depression 5) van't Hoff factor (i) 6) Correct Significant Figures and Units followed

8. How many grams of sodium chloride should be used in compounding the prescription below? R Salt B chloride Sodium chloride Purified water ad 2% q.s. 30 mL Make isotonic solution Sig. Use as directed in the eye. E-value of Salt B is 0.20 A. 0.174 g B. 0.270 g C. 0.150 g D. 0.550 g

7.At what temperature will 50.0 grams of water freeze if 8.75  grams of sucrose, C12H22O11, a nonvolatile nonelectrolyte, is dissolved? (Kf = -1.86oC/m) Group of answer choices 1.35 -0.951 -1.35 0.751 -1.95

Colligative Properties Experiment 15: Colligative Properties Postlab 1. When the stems of cut flowers are held in concentrated NaCl (aq), the flowers wilt. Explain the basis of this phenomenon. Is this an isotonic, hypotonic or hypertonic solution? 2. Given two NaCl(aq) solutions at the same temperature; (1) saturated solution with excess NaCl(s) remaining at the bottom of the container and (2) an unsaturated solution with all NaCl dissolved in solution. a. Above which solution is the vapor pressure of water greater? Explain. b. Which of these solutions has the higher boiling point? Explain

Consider 2 aqueous solutions: H2O/NaCl and H2O/CH3OH.  Which one will exhibit a positive/negative/no deviation compare to Raoult’s prevision: a.   H2O/NaCl and H2O/CH3OH both exhibit a negative deviation   b.   H2O/NaCl and H2O/CH3OH both exhibit a positive deviation   c.   H2O/NaCl and H2O/CH3OH don’t exhibit any deviation   d.     H2O/NaCl negative deviation and H2O/CH3OH positive deviation   e.     H2O/NaCl positive deviation and H2O/CH3OH negative deviation

10:24 1 4 7 +/- 2 Question 7 of 9 An aqueous solution of acetone (MM = 58.08 g/mol) has a molality of 2.21 m and a density of 1.25 g/mL. What is the molarity of acetone in the solution? 5 8 M 3 6 9 O LTE O Tap here or pull up for additional resources Submit X C x 100

SW # 2 Name Section Show your solution in another sheet of paper. A. Complete the table below for the aqueous solution of caffeine C3H1,0,N. Molality 1) 4) Mass percent solvent 2) 5) Ppm solute 3) Mole fraction solvent 0.900 1269 6) 7) 8) 11) 85.5 0.2560 10) 12) B. Complete the table below for aqueous solution of potassium hydroxide Density (g/ml) Molarity 1.13 Molality 13) 16) Mass percent of solute 14) 1.06 15) 17) 1.29 30.0 1.43 14.2 18) C. Acetone, C,H,0 is the main ingredient of nail polish remover. A solution is made up by adding 35.0 ml acetone (density = 0.790 g/ml) to 50.0 ml of ethyl alcohol, C, H,0 (density =0.789 g/ml) Assuming volumes are additive. Calculate 19 )Mass percent of acetone 20) Volume percent of ethyl alcohol 21) Mole fraction of acetone

10:13 1 4 7 +/- Question 3 of 16 What is the solubility of PbF2 in water? (Ksp of PbF₂ is 3.6 × 10-³) 2 5 8 M 3 60 9 O Submit Tap here or pull up for additional resources XU x 100

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5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo- hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number of significant figures. B. Freezing Point of Cyclohexane plus Calculation Zone Unknown Solute 2. Mass of cyclohexane (g) 10.14 Part C.4 3. Mass of added solute (g) 0.255 C. Calculations 1. k; for cyclohexane (°C⚫ kg/mol) 20.0 2. Freezing point change, AT, (°C) 3.04 Part C.6 3. Mass of cyclohexane in solution (kg) 4. Moles of solute, total (mol) Show calculation. 5. Mass of solute in solution, total (g) 6. Molar mass of solute (g/mol) Show calculation.