Homework Answers
As we know that the presence of an electrolyte is essential for the stability of colloidal solution but larger quantities coagulate . Hence it is necessary to reduce the concentration of these soluble impurities to a requisite minimum .
The methode used to remove impurities is Dialysis , which is based upon the fact that colloidal particles can not pass through cellophane paper but ions of the electrolyte readily can pass .
Now in the experiment of the given condition the result that we expect is the water must not have any dissolved salts and the bag must be immersed in water properly
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If you placed a dialysis bag containing NaCl solution, starch solution and glucose solution in a...
A dialysis bag containing a 20% glucose solution is placed in a beaker containing 10% glucose...
A dialysis bag containing a 20% glucose solution is placed in a beaker containing 10% glucose solution. Should the dialysis bag gain or lose mass after 1 hour in the beaker? Explain your answer.
which molecules NaCl, starch or glucose passed through the dialysis tubing into the surrounding solution? which one rema...
which molecules NaCl, starch or glucose passed through
the dialysis tubing into the surrounding solution?
which one remained inside of the dialysis tubing?
which of the molecules passed most rapidly through the tubing?
6. Which molecule(s) (NaCl, starch, or alucose) passed through the dialysis tubing into the surrounding solution? How do you know? 7. Which molecule(s) (NaCl, starch, glucose) remained inside of the dialysis tubing? 8. Which of the molecules passed most rapidly through the tubing? How do you know?
6. Dialysis bags containing a 0.5% sucrose solution are placed in beakers containing the sucrose solutions...
6. Dialysis bags containing a 0.5% sucrose solution are placed in beakers containing the sucrose solutions indicated below. Dialysis bags are NOT permeable to sucrose. -0.5% -0.5% sucrose 0.5% sucrose sucrose -Pure water -0.5% sucrose 1.5% sucrose Chades MN, LLC Indicate the letter of the beaker (A, B, or C) in which the following events or situations occur. a. The dialysis bag remains the same size. b. The dialysis bag shrinks. C. Water moves from the beaker into the dialysis...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was...
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...
You generated liposomes with phospholipid and cholesterol from a solution containing NaCl, glucose, and glycerol. You...
You generated liposomes with phospholipid and cholesterol from a solution containing NaCl, glucose, and glycerol. You precipitated the liposomes and transferred them into a solution containing distilled water. Would this liposome generate a membrane potential? YES OR NO?
The following five beakers, each containing a solution of sodium chloride (NaCl, also known as table...
The following five beakers, each containing a solution of sodium chloride (NaCl, also known as table salt), were found on a lab shelf: Beaker Contents 1 200 mL. of 1.50 M NaCl solution 2 100 mL. of 3.00 M NaCl solution 3 150 mL. of solution containing 22.5 g of NaCl 4 100 mL. of solution containing 22.5 g of NaCl 5 300 mL. of solution containing 0.450 mol NaCl Arrange the solutions in order of decreasing concentration. Rank from...
yellow, green or red, the test is positive. The color of the solution depends on the...
yellow, green or red, the test is positive. The color of the solution depends on the concentration of 3. Observe the color of your negative and positive controls. Note which one has a red color. 4 After the dialysis of the NaCi-elucose-red dye solution has progressed for an hour, test the water outside the dialysis bag (your experimental data) for the presence of Ci and glucose same way you did for your controls in steps 1 and 2. Observe if...
please help me with this experiment??? Enzymes Experiment 1: Enzymes in Food Amylase is used by...
please help me with this experiment???
Enzymes Experiment 1: Enzymes in Food Amylase is used by humans to facilitate digestion. Specifically, it is an enzyme that breaks down starch molecules into sugar molecules. This is why people sometimes observe a sweet taste after sucking on a starch-containing food for an extended period of time. Amylase is found naturally in human saliva and the pancreas. However, it is also present in some of the common plant foods consumed by humans. This...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification Reactions Q: Calculate the expected mass of both methyl salicylate and aspirin assuming 100% yield. EXPERIMENT7 PREPARATION OF PHARMACEUTICALS...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
Can you please explain in simple terms the methods of this experiment? I'm having difficulty visualizing...
Can you please explain in simple terms the methods of this experiment? I'm having difficulty visualizing and understanding what is being done. I have copied and pasted some of the text from the article. Thank you! Abstract : Obesity, high-fat diets, and subsequent type 2 diabetes (T2DM) are associated with cognitive impairment. Moreover, T2DM increases the risk of Alzheimer's disease (AD) and leads to abnormal elevation of brain beta-amyloid levels, one of the hallmarks of AD. The psychoactive alkaloid caffeine...
A dialysis bag containing a 20% glucose solution is placed in a beaker containing 10% glucose solution. Should the dialysis bag gain or lose mass after 1 hour in the beaker? Explain your answer.
which molecules NaCl, starch or glucose passed through
the dialysis tubing into the surrounding solution?
which one remained inside of the dialysis tubing?
which of the molecules passed most rapidly through the tubing?
6. Which molecule(s) (NaCl, starch, or alucose) passed through the dialysis tubing into the surrounding solution? How do you know? 7. Which molecule(s) (NaCl, starch, glucose) remained inside of the dialysis tubing? 8. Which of the molecules passed most rapidly through the tubing? How do you know?
6. Dialysis bags containing a 0.5% sucrose solution are placed in beakers containing the sucrose solutions indicated below. Dialysis bags are NOT permeable to sucrose. -0.5% -0.5% sucrose 0.5% sucrose sucrose -Pure water -0.5% sucrose 1.5% sucrose Chades MN, LLC Indicate the letter of the beaker (A, B, or C) in which the following events or situations occur. a. The dialysis bag remains the same size. b. The dialysis bag shrinks. C. Water moves from the beaker into the dialysis...
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...
yellow, green or red, the test is positive. The color of the solution depends on the concentration of 3. Observe the color of your negative and positive controls. Note which one has a red color. 4 After the dialysis of the NaCi-elucose-red dye solution has progressed for an hour, test the water outside the dialysis bag (your experimental data) for the presence of Ci and glucose same way you did for your controls in steps 1 and 2. Observe if...
please help me with this experiment???
Enzymes Experiment 1: Enzymes in Food Amylase is used by humans to facilitate digestion. Specifically, it is an enzyme that breaks down starch molecules into sugar molecules. This is why people sometimes observe a sweet taste after sucking on a starch-containing food for an extended period of time. Amylase is found naturally in human saliva and the pancreas. However, it is also present in some of the common plant foods consumed by humans. This...
PREPARATION OF PHARMACEUTICALS - Fischer Esterification
Reactions
Q: Calculate the expected mass of both methyl salicylate and
aspirin assuming 100% yield.
EXPERIMENT7 PREPARATION OF PHARMACEUTICALS Fischer Esterification Reactions Almost 2500 years ago, physicians such as Hippocrates recommended that patients chew on the bark of the willow to alleviate pain. The active ingredient in willow bark was found to be salicin, a compound made of a molecule of salicyl alcohol bonded to a p-D-glucose molecule. In the stomach, the bond between...
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