test tubes surrounding the dialysis tubings was tested with standard food test reagents at the beginning of the experiment and again after one hour. The results showed that neither starch nor reducing sugar was present in the water surrounding tubes A and B at the beginning of the experiment. (7 marks) water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes A B water bath at 37ºC starch + water starch + amylase + water dialysis tubing test tubes A B (a)
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explain experimental data concerning different concentration gradients‚ (3) To complete a data table and prepare a graph to illustrate the data‚ and (4) To apply information from this experiment to other related problems. MATERIALS: 6 pieces of dialysis tubing Sucrose solution concentrations of 0M‚ .2M‚ .4M‚ .6M‚ .8M‚ 1.0M String Balance 6 beakers or plastic cups
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Raisha Miggins Lab 5: Osmosis Purpose The purpose of this lab was to explore the concept of Osmosis using dialysis tubing and different concentrations of sucrose solutions‚ and to help one better understand what happens to cells when they are exposed to solutions of differing tonicities. Hypothesis If the four dialysis tubes containing different concentrations of sucrose are all placed in their appropriate solutions for 20 minutes‚ then my predictions are as follows: The 1% in 1% sugar solution
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from an area of higher concentration to an area of lower concentration. Because of the selective permeability of the membrane only water and other very small particles (iodine) can be diffused through simple diffusion. The solution out of the dialysis tubing had a higher distelled iodine concentration of solutes (iodine + H2O) than did the starch solution. So iodine move into the cell and react with starch molecules to formed starchiodine‚ the blue compound‚ with a specific rate. The test show that
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4A- The hypothesis was partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because
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deionized water at room temperature. Every 10 minutes for 70 minutes we took out each cell‚ weighed it‚ and recorded the data. CITATION Ral \l 1033 (Traxler‚ 1906)Abstract The materials that were used to set up the experiment were 4 bags of dialysis tubing‚ 8 clamps‚ and 4 beakers. The 4 bags will be filled with different solutions one being tap water‚ the
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observe diffusion happening within the cells‚ and to help understand the sizes of molecules and how the chemical reactions take place. Therefore‚ the experiment was conducted using glucose and starch solution inside the dialysis tube. The starch and glucose that was put inside the dialysis tube help identify which of the two will reacted with potassium iodide inside the breaker‚ as the latter passed from the beaker into the tube‚ the glucose/starch solution’s change of color showed that the potassium
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with a compound microscope. Under microscope‚ chloroplasts (green organelles) in Elodea tend to bound to the cell wall in pond water‚ spread all over the cell in distilled water‚ pull away from cell wall in 20% NaCl. In our last experiment‚ we use a dialysis bag that contains 30% glucose and starch solution then place into a beaker of water and iodine solution. We then remove the bag out of the beaker‚ and use two test tube which label BAG‚ BEAKER to perform a Benedict’s test. We place solution in the
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concentrated on the placing potato cylinders in different sucrose concentrations for a period of time. This part was conducted to see if the potato cylinders would gain weight or lose weight because of osmosis. The second part was conducted to see if a dialysis bag‚ filled with sodium sulfate and starch solution and placed in an albumin/glucose solution‚ would contain albumin/glucose from the outside or the albumin/glucose solution would contain any sodium sulfate/starch from the inside. The first part
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that the lower the concentration of the solute‚ the faster that osmosis will happen in the solvent. To start we grabbed 5 strips of dialysis tubing‚ 10 orange clamps‚ and beakers labeled 1 through 5. After we got those supplies we soaked the dialysis tubing until it softened. We then clamped on end of each dialysis tube. After this was done we filled each dialysis tube with 10 mL of a specific concentration of liquid and then clamped the other end. One with tap water‚ one with 20% sucrose‚ one with
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