Between the Rate of Diffusion and Molecular Weight as Observed in Postassium manganate‚ Potassium dichromate‚ and Methylene Blue Elisha Padilla Group 3 Sec. X – 8L March 26‚ 20151 ABSTRACT The relationship between the rate of diffusion and the molecular weight of a substance was determined by introducing three substances (KMnO₄‚ K₂Cr₂O₇‚ C₁₆H₁₈N₃SCl) of different molecular weight to agar-water gel‚ and measuring the distance of diffusion every three minutes for
Free Diffusion Molecular diffusion Potassium permanganate
Introduction The movement of molecules from an area of greater concentration to an area of less concentration is called Diffusion. Osmosis is the diffusion of water through a selectively permeable membrane from an area with greater concentration of water to an area with less concentration. A Hypertonic Solution is a solution of a higher concentration of solutes and a smaller concentration of water molecules than another solution. However‚ an Isotonic Solution is a solution that contains an equal
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Leo Pigao Susan Andres Edeliza Caparas Marites Sanchez Arma Cantre Aurora Lazaro Alma Castaño ABSTRACT Flavonoid pigments make plants colorful. Due to the varied colors‚ the researchers used extracts of Anthurium spathe‚ Onion skin and Rose petals as an alternative highlighter pen pigment to commercially available highlighter. The preparations of pigments were treated differently for quality sake. One was by boiling the samples in 100ml denatured alcohol for 1-2 minutes and the other
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contains betalain pigments within it’s vacuole‚ which gives it it’s purple-red colour‚ it’s this pigment which leaks out as the beetroot is heated and the cells membrane begins to break down. The practicals aim is to show the effect of temperature on the cell membrane by observing the colour change of the water the beetroot was placed in. The cell membrane is important as it controls the substances enters and leaves the cell with the movement of molecules occurs through diffusion. Diffusion constantly
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the membrane. Therefore‚ more of the red pigment in the beetroot would leak as the lipids control the substances that enter and leave the cell membrane. However the ethanol might also impair particular proteins or denature the structure as protein has a tertiary structure. Higher concentrations of ethanol would destroy hydrogen bonds that clasp the protein structure. As the lipids and proteins in the cell membrane would be destroyed‚ the pigment is able to leak from the cell at a higher rate
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forces‚ a substance moves from a region where it is more concentrated to one one where it’s less concentrated Up/against the concentration gradient: movement of a substance to where it is more concentrated. 5. What is diffusion and what are factors that affect diffusion? Diffusion is the net movement of like molecules or ions down a concentration gradient 6. List the participants in metabolic pathways and explain what their function is. Substrates-substance
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describe protein only‚ not a membrane. --> destruction Hypothesis: The pigment in beetroot is permeable to the chemicals in the mouth rinse Principles: The plasma membrane is made up of protein and lipid molecules. These two main components are affected by various chemicals. In this investigation‚ we study the degree of denaturation of the membrane of beetroot by different substances. Beetroot cells contain a water-soluble pigment‚ ‚ in their vacuole which upon denaturation of membranes is released
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containing deionized water. After 20 minutes in these diffusion solutions‚ we took the beets out with a dissecting needle and discard it. We then stirred each solution in the test tube with a stirring rod‚ and transferred it to a cuvette. A spectrophotometer was then calibrated‚ and used to measure the absorbance of each exposure solution‚ and diffusion solution. Membrane Damage For the lab experiment for Membrane Damage‚ we tested the extract pigment and diluted it. When the pH solutions are added
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Hypothesis Organic solvent and high temperature will destroy the cell membrane and make it permeable to the red pigment. The higher the concentration of the alcohol‚ the greater will be this effect. Principle Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability of the cell membranes. Beetroot contains a red pigment called betalain‚ which is located in the large central vacuole of the beetroot cells. The vacuole is enclosed
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reading of the colorimeter the more anthocyanin leaked out by the beetroot hence a higher the rate of diffusion. Equipment Reasons for use… Colorimeter The colorimeter will measure the amount of light absorbed by the pigment in beetroot. The higher concentration of anthocyanin equals a higher reading on the colorimeter. A colorimeter will give an accurate measurement of the light absorbed by the pigment. The precision of the colorimeter is to two decimal places. I must make sure the cuvette has no
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