The formula used to calculate osmolarity is shown below:
Here n is number of particles that dissociated from solute particle.
KCl dissociates into two ions K+ and Cl-. MgCl2 dissociates into three ions Mg2+ and Cl-. Therefore, n for KCl is 2 and n for MgCl2 is 3.
The osmolarity is calculated as shown below:
1. Calculate the Osmolarity of a 0.2M solution of MgCl2 and a 0.5M solution of KCI....
Questions I a) What is osmosis? b) What is dialysis? Can MgSO4 pass through? Explain. 2. Can starch pass through a dialyzing membrane? (Support your claim with evidence from the experiment.) 3. Explain why people who are adrift in a lifeboat without a supply of fresh water are advised not to drink ocean water. note - Ocean water is saltier than body fluids like blood plasma. 4. In terms of osmosis, what happens when fresh water is inhaled into a...
Osmosis-Compare solution level between semipermeable membrane (Pool 1 of 2) A lask conlains two compartments (A and B) with equal volumes of solution separaled by a sempemeable membrane. Which dagram represents the final levels of liquid when A and B corlin each of the tollowing solutons7 Dagran 3) 12 1% (w/v) sucrose 0.20 M CaC2 0.25 M Na2SO 2.0 M Na2SO4 a. 3% (w/v) sucrose b. 0.30 M NaCi A B c 0.25 M MgCl2 d. 2.0 M KC
Quiz 3 Bios 240 1. Two solutions are separated by a semipermeable membrane that is permeable to sodium but not chloride or potassium ions. Solution A on the left contains a solution that is 100 mM NaCI, while Solution B on the right has a concentration of sodium chloride of 1 mM. There is an electrode in both solutions, and a comparative assessment of voltages between the two compartments is being made. The investigator doing the study decides to call...
6 Fill in the blanks to complete the following sentences. relative to the cells of the potato in Part A. a The distilled water was with respect to the distilled b The solution in the Part B dialysis tube was initially water bath. c The driving force for both osmosis and dialysis is the generation of on either side of a membrane. 7 Did the potato from Part A and the dialysis tube from Part B undergo the same process...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was placed in a beaker containing a solution of 20% glucose. After one hour, the bag was weighed again a. Calculate the % mass change of this dialysis bag from the following information: • Mass of bag before experiment: 15.39 • Mass of bag after experiment: 12.79 b. Determine the tonicity of the beaker when it is compared to the dialysis bag: 2. facell had...
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Drive 9 47 PM Mon Jan 21 30% Case Study Questions Dehydration is a serious and common condition. It changes body fluid volumes and can change body fluid composition and concentration. This can result in the redistribution of fluid between compartments. This problem deals with osmosis between red blood cells and ECF A patient was admitted to the ER late at night. The residents were asleep leaving a 3nd year medical student (Jim Stephens) on duty. The patient...
9. Then add slowly while mixing 1 mL of saturated sodium bicarbonate solution (NaHCO3) -IT WILL BUBBLE! Add additional drops of saturated sodium bicarbonate solution with mixing until no additional bubbling occurs Congratulations! You have just made your first ester. Now you want to separate your ester product from the other stuff in the reaction mixture. CTQ3 Sodium bicarbonate is a base. How will it interact with any carboxylic acid molecules still present in your reaction mixture? 10. Add 1mL...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
using pictures and a maximum of 10 words, explain why an oven-dried
5-ml conical vial and drying tube(step 1 and 2 of part 1) are used
in the reaction. do both please! also the notebook pages are the
procedure
(1) Using pictures and a maximum of 10 words, explain why an oven-dried 5-ml conical vial and drying tube (step 1 and 2 of Part 1) are used in the reaction. (2) After the addition of benzophenone to the mixture of...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...