Proactiv Solution Essays

plants. In addition to this, concentration of sucrose in a solution and in a plant cell or plant tissue shall have an effect on water potential. The experiment shall use several concentrations of sucrose solution and a substance known as Methylene blue. A piece of potato/ carrot shall be placed in a boiling tube and the solution shall be poured into it. This tube shall have Methylene blue added into it. After incubation some of this solution shall be taken out with a pipette and inserted into a separate

similar concepts but have their own individual processes. Osmosis is the process in which there is transport of a solvent through a semipermeable membrane that separates two solutions of contrasting solute concentration. During osmosis, the solvent moves from the solution that is lower in concentration of solute to the solution that is higher in concentration of solute, eventually reaching an equilibrium (Johnston). Diffusion is the movement of matter from one point to another by random molecular motions

ftp678 BIOLOGY IA SL Research Question: If the chips are put under water in a sucrose solution., will their mass decrease in a certain concentration of sucrose solution? Hypothesis: The increase of volume of sucrose solution will affect the mass of the chips to decrease since the water will possibly transport itself out of the cells. The larger the absorption of sucrose solution, the lower the mass of the chips will become. On the other hand, if it is in infused water or has very

isolation of the desired product from the solution, will illustrate a typical application of extraction.  Some organic acids are liquid and are soluble in water as indicated. The sodium salts of these acids are ionic compounds that are also very soluble in water. If an aqueous solution of one such salt is acidified with a strong mineral acid, the much weaker organic acid is produced.  The weak organic acid is largely un-ionized in the aqueous solution.  No apparent change is observed when the

3-4 days to dissolve its shells, which results in a delicate shell membrane connecting the inner contents of the egg. The shell is selectively absorbent only to water. The solution that is the dissolved in the internal contents of the egg is approximately 18-20% which is the solute concentration. solute concentration is the solution that will be dissolved by the egg. The process that will be tested for the egg is osmosis, which is the diffusion of water across a selectively permeable membrane from an

The purpose of this experiment was to test the tonicity of the different solutions. Background: Diffusion and osmosis are both processes that occur within the plasma membrane. Diffusion is the process by which molecules intermingle as a result of kinetic energy. Osmosis is the movement of water across a semi-permeable membrane. Tonicity is also related to osmosis. Tonicity is the ability of an extracellular solution to make water move into or out of the cell by osmosis. A solution’s tonicity

concentration. Isotonic are solution is which water molecules and solute molecules have an equal concentration, that means that the water diffuses in equal rates. Glucose is a sugar that can be used in many different forms. Glucose in plants is used by photosynthesis and is needed in order for respiration to occur and produce energy or to produce cellulose and proteins.

standard solutions were prepared. As a whole, the experiment was conducted by four people, however, for Part A, the group was split in two to prepare the two different solutions. Calibrations curves were created for the standard solutions of both Red 40 and Blue 1. Each solution was treated with a serial 2-fold dilution to gain different concentrations of each solution. The serial 2-fold dilution were done with a volumetric pipette, its pump, and 10 mL volumetric flasks. Eight different solutions were

Spectrophotometers measure wavelength based on the color produced. In addition, we will be using standard curves to calculate protein concentrations. This experiment is extremely beneficial to biochemists because determining the amount of protein in a solution is crucial. Also, because spectrophotometers are useful for determining the substances that

would forward the rate of dissolution. Based on the background on making lemonade, when sugar is added to water and stirred the sugar (solute) dissolves quickly, when sugar (solute) is fine, the temperature is raised, and agitation is increased the solution dissolves at an increased rate.

Graphing to Determine the Density of Unknown Metals Purpose: The purpose of this lab was to graph and compare measurements of mass, volume, and density of two unknown metals. Relationships in data and physical appearances were observed and used to identify each metal. The density was shown as the slope of the graph as both were equivalent to mass divided by volume. The experimental density was then compared to the actual value and a percent error was determined. Materials: Equipment and materials

The Effect of Corn Syrup on Potatoes Over time various items have been tested to see how osmosis affects the mass and shape. Corn Syrup is commonly used when testing the effect of osmosis on different items like eggs or potatoes. Due to the high amount of concentration in the syrup it causes osmosis to occur when objects are placed in it over an extended period of time. Scientists have experimented on different products before and have found that the items can either shrivel or expand and bust. However

Solubility is a thermodynamic process which determines “how much” of the solute dissolves in a solvent, whereas dissolution is a kinetic process which determines “how long” it takes to reach the value. Both these processes are important in determining the residence time of an inhaled drug locally in the lungs. Equilibrium solubilities of moxifloxacin and ethionamide were determined in PBS, pH 7.4 without and with lung surfactant, Curosurf®. Solubilities of moxifloxacin and ethionamide (Table 1) in

Individual K-plus and Cl- ions are penetrated by Water molecules that surround them, weakening the interionic interactions that hold the ions together and allowing the ions to disperse into solution as solvated ions. Ion-dipole interactions are hence responsible for potassium chloride's solubility in water. Evaluation of Hypothesis The outcome demonstrates that the hypothesis is valid. According to the idea, a greater temperature means a lower

is added until the mark is reached (stock solution). In proportion to the expected chloride content aliquot part of this solution, which should preferably contain 50 mg – 100 mg NaCl, taken off, distilled water being added to obtain a quantity of approximately 100 mL. Subsequently 5 mL ferric alum solution, 20 mL 0.1 N AgNO3 solution and 5 mL – 10 mL ether or 1 mL nitrobenzene are added; titration is carried out by means of an ammonium thiocyanate solution 0.1 N, until the red colouring remains after

membrane, minus the difference in the osmotic pressure of the solutions of the feed and permeate side of the membrane which is written as. While the solute flux depends on the concentration gradient as: The membrane rejection is defined as the difference between the feed concentration and permeate concentration as: From the solvent and solute flux Equations.

find out how the Concentration of a Salt Solution will affect the mass of a Potato Investigation Background Information: In this investigation we are going to see how osmosis occurs in a potato and affects the mass by reducing or adding onto it. Osmosis is the diffusion of water between a semi-permeable membrane from a higher concentration to a lower concentration. Variables that can be explored in this investigation is how the concentration of salt solution could affect the mass as well as how

3.1. PHYSIO-CHEMICAL CHARACTERISTICS The characteristics vary from the source as well i.e. kitchen wastewater is considered to contain higher amount of organics and physical pollutants as compared to that of laundry or bathroom wastewater (Eriksson et al., 2002). Surendran and A. D. Wheatly (1998) have found that the characteristics of grey water were found to be similar to that of domestic sewage except in terms of the ammonia and bacterial content The physical characteristics of waste water considered

percent of sucrose solution out of the four variables; 0% , 5%, 10%, and 15%. After we filled the beaker we then got two potato cores. Once we had the cores we cut the skin off the ends. Following this we then cut the two potato cores into four 2.00 cm potato cores. After they were cut into 2.00 cm each we found the mass. We zeroed out the scale and weighed all four potato cores at once and recorded the mass. We then put those potato cores into the beaker of 75 mL of solution. With the potato cores

For this experiment, we studied how planarian worms would grow after being segmented. To begin this experiment, we filled up petri dishes half-way with spring water, this is so the planarian worms would not dehydrate and die during the two weeks we were observing them. Next, the planarian worm was picked up from its container with a pipette and then placed in a separate petri dish with some water. This took some time and I ended up having to use a pick to get the planarian worm off the inside walls