7. During week l's lab we investigated the effect of different soaking solutions on the behavior of red blood cells. If the blood had arrived on time, our prepper would have needed to know how to make up different concentrations of saline (NaCl) solution from a 2.7% stock solution of NaCl. Can you help her by filling in the table below? For each group of students, you want to make 9ml of either 0.9% saline or 0.45% saline. Show your working out below the table you complete. 0.45 % saline solution wt/vol Volume of 2.7 0.9 2.7%wt/vol NaCl in ml Volume of distilled water in ml

7. During week l's lab we investigated the effect of different soaking solutions on the behavior of red blood cells. If the blood had arrived on time, our prepper would have needed to know how to make up different concentrations of saline (NaCl) solution from a 2.7% stock solution of NaCl. Can you help her by filling in the table below? For each group of students, you want to make 9ml of either 0.9% saline or 0.45% saline. Show your working out below the table you complete. 0.45 % saline solution wt/vol Volume of 2.7 0.9 2.7%wt/vol NaCl in ml Volume of distilled water in ml

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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In this task, you are to prepare 3 × 100 mL solutions of acetic acid at 3 different concentrations. You are provided with a stock solution at 2 % and will need to perform 3 dilutions. Complete the table below to calculate how much of the stock solution and how much water is required to prepare these solutions. For this calculation the following equation may be useful: C₁ V₁ = C₂ V2 Where C₁ is the initial concentration of the stock solution, V₁ is the amount of stock solution you need to add, C2 is the final concentration that you desire and, V2 is the final volume that you desire. All the values for this equation have been provided, aside from V₁ which you will need to solve the equation to determine. + Solution 2 Acetic acid at 0.5 % Solution 3-Acetic acid at 0.2% Solution 4 - Acetic acid at 0.1% Amount of stock solution to add A student uses the 1% acetic acid stock solution to make a new dilution for an experiment. The student takes 32 mL of the stock solution and makes a dilution…
Part1: 1.05×10-1 m glucose solution made by dissolving the glucose in 100.0 kg of water: ____ mol Part2: 2.35×10-2 m Na2CrO4 solution made by dissolving the Na2CrO4 in 1000.0 g of water:____ mol
Complete the sentences below: To make 4 liters of a 2.0 M solution you need to dissolve 8 moles of NaOHin enough water to make 4 liters of solution. 0.1 L of a 2.00 M solution of Na¿CO3 contains Write your response here.. 9 moles of Na2CO3 in Please type your answer to submit Write your response here. mL of water. Please type your answer to submit To make 750 mL of a 2.00M solution of H2SO4you would need to measure Write your response here.. ! grams of H2SO4. Please type your answer to submit
b. Account for this fact: Mixing 50 mL of methanol with 50 mL of water produces a solution with a volume slightly less than 100 mL. OMethanol evaporates during the mixing. ODuring hydration, methanol molecules decrease in volume. Owater evaporates during the mixing. Owater molecules interact extensively with methanol molecules. Submit Answer e Try Another Version F5 n F6 2 item attempts remaining S F7 C/C+ SONY F8 F9 e WEB F10 OFF One Touch Web Access Without Booting F11 F12 Num Lk PrtSc Sys
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3. An important conversion factor that you must memorize and use in this course is: 1 mg/L = 8.34 lb/million gallons a) Start with a value of 1 mg/L and use dimensional analysis to prove that this conversion factor is correct: Show that 1 mg/L = 8.34 lb/million gal. b) A wastewater treatment plant adds 5 mg/L of a commercial polymer to raw water to enhance removal of colloidal particles during settling. If the flow rate of water into the facility is 100 MGD, how many pounds of polymer are needed each year? (hint, use the required conversion factor 1 mg/L = 8.34 lb/million gallon to perform the calculation)
In the laboratory you are asked to make a 0.170 m ammonium acetate solution using 455 grams of water. How many grams of ammonium acetate should you add? grams.
Part 1. One gram of caffeine dissolves in 55 ml of water; 7 ml of dichloromethane (DCM); 530 ml of diethyl ether; and 100 ml of benzene. Covert the solubility of caffeine in these four solvents into units of mg/ml. a) Solubility of caffeine in mg/ml in water: b) Solubility of caffeine in mg/ml in DCM: c) Solubility of caffeine in mg/ml in Diethyl Ether: d) Solubility of caffeine in mg/ml in Benzene: Which is the optimal solvent to extract caffeine from an aqueous solution? Why? Part 1 Continued: Use intermolecular force (IMF), provide a brief explanation on the solubility of caffeine in water, diethyl ether, observed above. (Hint: draw the skeletal structures for caffeine, DCM and diethyl ether)
In Part C of the experiment, you added a 6.0 NaOH solution to the aqueous solution of NaCl. Did the addition of the NaOH solution change the identity of the NaCl solute in the water? If so indicate the new identity. Group of answer choices No. Adding NaOH did not change the identity of the NaCl Yes. Adding NaOH changed the NaCl to NaClO Yes. Adding NaOH changed the NaCl to NaHClO Yes. Adding NaOH changed the NaCl to water Yes. Adding NaOH changed the NaCl to NaOH
f. Make 750ml of a 250mM NaCl, 25mM Tris solution. C₁=251 CABO VA 230 g. Make 50ml of a 15g/L NaOH solution
calculate the composition - mass/mass% of 46.8g Kcl per (6.00x10^2 ml solution (d=1.14g/ml) ___ %kcl