Data collection Quantitative Data Raw Data Table 1: Table showing the mass of the amount of unknown acid X measured in grams (±0.001g) Table 2: Table of reading of the burette initially filled with 25mL of 0.201moldm-3 sodium hydroxide (NaOH) to titrate 25mL (±0.03mL) of unknown acid X in mL (±0.05mL) after each titre. Reading on the burette initially filled with 25mL of 0.201moldm-3 NaOH (±0.05mL) First titre 21.3 Second titre 18.2 Third titre 15.2 Fourth titre 12.0 Qualitative
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Many compounds absorb a certain spectrum of visible light. Since Beer’s Law describe the relationship between molar absorptivity and concentration‚ one could use his equation A = kc to find the unknown concentration by the known absorptivity. The graph of absorption spectrum is represented by a linear regression. From the graph‚ one could deduct that as the concentration decreases‚ the absorptivity also decreases. Materials and Methods: Obtain 7 test tubes and labeled them. Each test tube‚ pipet in
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In order to fully understand the concept of this experiment‚ one must first be introduced to diffusion. Diffusion is a spontaneous process by which molecule particles move from one area that is highly concentrated to another area in which its concentration is lower. Cells contain fluids and are surrounded by fluids; in order for a cell to function it is required to be in a balanced state. The progress in which a cell is in its balanced state is called equilibrium. Diffusion is a functioning way for
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Results/Discussion: From the evaporation technique‚ 4.39g of barium nitrate dissolved in water and 2.34g of barium nitrate dissolved in the acid. From that the concentration of barium nitrate in its saturated solution in water was 0.336mol/L and 0.179mol/L in HNO3. The concentration of Ba2+(aq) ions in saturated solution is the same as the concentration of the saturated barium nitrate solution by dissociation of barium
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the effect of osmosis In potato cells Introduction I am doing an experiment to find out the effect that osmosis has on Water solution and a Sugar solution. Osmosis is a process which water moves from an area of low concentration to an area of high concentration. I am going to record my results to see if osmosis occurs in water solution of sugar solution. Apparatus In this experiment I would need; - 1) 3 test tube 2) A beaker 3) A cork borer 4) A Knife
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Joscely Garris Professor Vinh Hoang CHEM 1151L – 254 25 October 2013 Preparation of Viscous Solution This report discusses an experiment to study the relationship of solute/solvent and the calculations involved to measure the concentration of the solution. The first experiment to take place is the preparation of a salad dressing using xanthan gum solution‚ water and oil. Commonly used as a food thickening agent‚ Xanthan gum is a large molecule composed of several saccharides linked together
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------------------------------------------------- The experiment is conducted in order to determine the equilibrium constant of the Iron (III) – Thiocyanate System through the use of a UV-Vis Spectrophotometer. It is achieved by inserting a series of solutions with varying concentrations of Fe3+ and SCN- into a cuvette‚ then to the spectrophotometer in order to determine the degree of absorbance of the [FeSCN2+].First‚ standards solutions are used in order to determine several critical values. Then‚ unknown solutions are used
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the solution absorbance using a spectrophotometer are the techniques that will be used in this experiment. The absorbance measurement gives the concentration of FeSCN2+. The concentrations of Fe3+ and SCN- are obtained as the difference between the initial concentration and the concentration consumed by the formation of the FeSCN2+. The combined concentrations will be used to calculate an equilibrium constant for the formation of the complex. The reaction for the formation of the dark red FeSCN2+
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SPEC20 with a wavelength of 630nm. We calculated the molar concentration of each dilution using the formula M1V1=M2V2 We determined the linear relationship between transmittance and molarity by taking the inverse log(-logT) of percent transmittance(in decimal form). We determined the relationship between transmittance and molarity by graphing the data table. Data: Solution Dilution Ratio mL stock/mL water Molar concentration (M) Measure percent Transmittance Measure %T in Decimal Form
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quantify the concentration of the Bovine Serum Albumin (BSA) then constructing a standard curve graph and to use the spectrophotometer to perform an enzyme assay using different concentration of the BSA. Experiment 5 also verifies the Beer-Lambert Law‚ which is the linear relationship between absorbance and concentration of an absorbing species. Absorbance formula is shown in fig. 1.1. However‚ the Beer-Lambert Law is not obeyed at high concentration as solution with high concentration may alter the
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