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Dialysis Materials: starch glucose sodium chloride iodine solution silver nitrate solution Benedict's solution Equipments: dialysing tubing glass rod cotton thread beaker dropping pipette test tubes test tube rack test tube holder Bunsen burner tripod gauze matches stop clock Method: 1. Wet the piece of dialysing tubing and open it using a glass rod. Tie a secure knot in one end of the tubing. 2. Inject the mixture of starch, glucose and sodium chloride solution into the open end of the dialysing tubing using a dropping pipette. 3. When the tubing is nearly full tie a thread of cotton tightly round the open end of the dialysing tubing. Wash the tubing throughly under the tap and then wash it again using distilled water. 4. Suspend the dialysing tubing in a beaker and fill it with distilled water up to the level of knot. Immeadiately start your stop clock and, using a pipette, take three small samples from the distilled water in the beaker and put them into three test tubes. 5. Test your samples for the presence of...

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