This is what i read from wikipedia:
"Dialysis tubing is not permeable to glucose."
Is that true? Visking tubing (Dialysis tubing) DOES allow glucose molecules to pass through it right??
So what types of molecules can pass through visking tubing? Can someone tell me which of these can pass through visking tubing and which ones cant?
1. Glucose
2. Maltose
3. Lactose
4. Fructose
5. Galactose
6. Sucrose
7. Starch
Please help thanks LOADS!!!!!!!!
Dialysis tubing, also known as visking tubing, is a semi-permeable membrane commonly used in laboratory settings for various applications, including dialysis and diffusion experiments. The permeability of dialysis tubing depends on its molecular weight cutoff (MWCO).
Now, let's address each molecule you mentioned and whether it can pass through visking tubing:
1. Glucose: Yes, glucose molecules can pass through visking tubing as they are relatively small, with a molecular weight of 180.16 g/mol.
2. Maltose: Yes, maltose molecules can also pass through visking tubing. Maltose consists of two glucose molecules bonded together and has a similar molecular weight to glucose.
3. Lactose: Yes, lactose can pass through visking tubing. Lactose is a disaccharide consisting of glucose and galactose, and both glucose and galactose can pass through the tubing.
4. Fructose: Yes, fructose molecules can pass through visking tubing. Fructose is a monosaccharide with a similar molecular weight to glucose.
5. Galactose: Yes, galactose can pass through visking tubing. Galactose is a monosaccharide and, as mentioned earlier, both glucose and galactose can pass through the tubing.
6. Sucrose: Sucrose molecules cannot pass through visking tubing. Sucrose is a disaccharide composed of glucose and fructose. Although both glucose and fructose can pass through the tubing, the larger sucrose molecule with a molecular weight of 342.3 g/mol cannot cross the membrane.
7. Starch: Starch is a large polysaccharide composed of many glucose units linked together. Starch molecules are too large to pass through visking tubing, so they would be retained within the tubing and not pass through the membrane.
To determine the permeability of different molecules through visking tubing, you can conduct a simple experiment by filling the tubing with a solution containing the molecule of interest and submerging it in a suitable surrounding solution. By observing the movement of molecules and measuring their concentrations over time, you can determine which molecules can pass through the tubing.
I hope this explanation helps you understand which molecules can pass through visking tubing. Feel free to ask any further questions!