http://www.wellesley.edu/Biology/Concepts/Html/standardcurve.html Tube number Water (ml) Blue Solution (ml) Total Final volume (mL) Concentration (mg/ml) 1 0 5.0 2.5 1 mg/ml 2 2.5 2.5 ml from tube 1 2.5 3 2.5 2.5 ml from tube 2 2.5 4 2.5 2.5 ml from tube 3 2.5 5 2.5 2.5 ml from tube 4 5.0 2. If the solution in tube 1 is dark blue‚ do you expect the solution in tube 5 to be darker or lighter? Lab 6 Protocol Spectrophotometry
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SOLVENT EXTRACTION Solvent extraction‚ also known as liquid extraction and partitioning‚ is a method to separate compounds based on their relative solubility in two different immiscible liquid‚ usually water and organic solvent. It is an extraction from one liquid phase to another liquid phrase. Liquid extraction is a basic technique in chemical laboratories‚ where it is performed using a separator funnel. This type of process is commonly performed after a chemical reaction as part of the work-up
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measure of free energy of water in a solution. The purpose of this lab was to find the water potential of a potato cell. The problem of this lab was‚ if there was a high molarity of solute‚ would it have a positive or negative water potential? The hypothesis of the experiment was‚ if there is a high molarity of solute then the water potential would be lower or negative. After obtaining potatoes‚ we cut them into pieces‚ weighed them‚ and then placed them in a solution overnight. In this lab‚ we explored
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advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases the speed of filtration. The crisscrossing of the folds help alleviate the pressure to make the flow of filtration faster. The surface are of the filter paper
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Brownian motion This is‚ presumably the random drifting of particles suspended in a fluid (a liquid or a gas) .This movement was discovered and later named after botanist Robert Brown (1773-1858). He was a Scottish botanist and palaeobotanist who made important contributions (including Brownian motion) to botany largely through his pioneering use of the microscope. The scientist who made Brownian motion famous is Albert Einstein‚ who brought the phenomenon to the attention of the larger physics community
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sucrose solution and distilled water have on the plasmolisys of epidermal cells of a red onion. Hypothesis: Taking in consideration osmosis‚ and my knowledge about it‚ my prediction is that as the molarity of the solution under which the cells are exposed will increase‚ also the amount of plasmolysed cells‚ counted from amount of undamaged cells taken into account‚ will also increase. Hence‚ theoretically‚ the amount of plasmolysed cells in distilled water should be 0‚ while at 1mol solution‚ all
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I predict that as the temperature is raised the number of molecules that are able to leave the cell and come into the solution will increase‚ however I think that there will be appoint at which the amount of molecules coming out will remain constant. Red beet tissue contains large amounts of betacyanin‚ a red pigment‚ located in the large internal membrane vacuoles. When the membrane is damaged‚ the pigment can cross the vacuole membrane and cell membrane. Since pigment is water soluble and not
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+ CO2 (g) (Imagination Toledo‚ 2017) Once the egg has been separated from its shell‚ the only thing keeping the liquid goo inside is the thin‚ flexible‚ semipermeable membrane. What would happen to naked eggs if they were submerged in different solutions? Before diving into the experiment it is helpful to understand a few terms we will use along the way. Osmosis is the movement of a solvent (as water) through a semipermeable
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I. PURPOSE OF EXPERIMENT The purpose of this Lab is to use spectroscopy create graph to determine the concentration of dye in a sport drink‚ by creating series of standard dilutions of an FD&C Blue 1 Stock solution and measuring the percent transmittance of each dilutions. Results in each dilutions will be use‚ to determine the linear function among various functions (T‚ T%‚ log T‚ - logT) For a Beer’s law calibration curve. The produce provides a model for guided-inquiry analysis of the concentration
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In test tube 1 with a 0% salt concentration‚ the potato core length after is 44 mm‚ the change in potato core length is 4 mm so the potato is hypertonic to that solution. In test tube 2 with a 0.625% salt concentration‚ the potato core length after is 42 mm‚ the change in potato length is 2 mm so the potato is hypertonic to that solution. In test tube 3 with a 1.25% salt concentration‚ the potato core length after is 39 mm‚ the change in potato length is -1 mm so the potato is
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