For acids * Place 2ml each of dilute acetic acid‚ hydrochloric acid‚ sulfuric acid‚ carbonated drink (colorless) and calamansi juice extract in separate test tubes. Test every solutions with blue and red litmus paper. Then add a drop of methyl orange indicator to each solutions. Record the data then wash and clean the test tube * Place another 2ml of the same acids in separate test tube. Test with a drop of phenolphthalein indicator. Then repeat the test with one drop of bromthymol
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The purpose of this practical was to measure the amount of a chemical substance present in a sample. Primarily‚ the aim of Experiment 1 was to measure the absorption spectrum of a particular coloured substance (in this case Bromophenol Blue and Methyl Orange) at varying wavelengths of light. For Experiment 2‚ the process of the experiment focuses on the substance and records its absorption levels at different concentrations. The absorption levels (A) that are obtained when samples of any given substance
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(3)NMRQuestion 1 1 / 1 point Equivalent protons in a molecule will result in one NMR signal. How many NMR signals would you predict for each of the following molecules? __1__ benzene __2__ 3-pentanone __4__ toluene __3__ ethanol __2__ t-butyl methyl ether 1. 1 2. 2 3. 3 4. 4 Question 2 1 / 1 point A compound to be analyzed by NMR should be dissolved in a solvent. Clearly the solvent should not have an NMR signal in the spectral area you are trying to analyze. Which solvents are appropriate
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experiment‚ the stationary phase was the filter paper onto which the dye samples were dropped onto while the mobile phase was the solvent mixture containing ethanol and water which carried the sample dyes as the mixture went up the paper at different rates. These rates depend on the solubility and polarity of compounds in solvent. The objectives of this experiment are to compute the retention factor values of 6 sample dyes: methyl
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proves a linear relationship between absorbance and concentration. This means it can be rearranged to find the find the optimum concentration for maximum absorbance. C = A/ ε Methods: The two reagents used are Bromophenol blue and Methyly orange. Experiment 1: 1 Set up the colorimeter at 400nm‚ measure the absorbance of both reagents against distilled water‚ this will be used as a blank (make sure to zero the colorimeter after each interval) 2 Repeat this procedure at 20nm from
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can easily know if a solution is an acid or a base using a visual indicator. Indicators are organic dye added to a solution that changes color base on the concentration of H3O ions in the solution. Each color change corresponds into a pH value. Common indicators used in the laboratory are methyl orange‚ methyl red‚ bromthymol blue‚ neutral red and phenolphthalein. In this experiment‚ methyl orange and phenolphthalein are used. To keep the pH within the narrow range we used a process called buffer
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compounds composed of nitrogen atoms bearing alkyl or aromatic compounds. Amines undergo interesting reactions‚ one of which is with the reaction with nitrous acid producing an azo dye. In this study‚ the experiment focused on synthesizing an observing the physical properties of Sudan-1. Sudan-1 is of the most common dyes found in waxes‚ oils and in some food ingredients specifically curry and chilli powder. Furthermore‚ this study aimed to understand the mechanism behind the synthesis of 1-phenylazo-2-naphtol
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pH Indicators pH indicators are weak acids that exist as natural dyes and indicate the concentration of H+ (H3O+) ions in a solution via color change. A pH value is determined from the negative logarithm of this concentration and is used to indicate the acidic‚ basic‚ or neutral character of the substance you are testing. Introduction pH indicators exist as liquid dyes and dye-infused paper strips. They are added to various solutions to determine the pH values of those solutions. Whereas the liquid
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biochemical tests utilized were; Triple Sugar Iron Agar (TSIA) test‚ Sulfur Indole Motility (SIM) test‚ Methyl red test and Voges-Proskauer (MR-VP) test‚ Citrate test‚ Urea test‚
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Scent-Infused Textiles consumer acceptance of fragrance-embedded textiles. Consumer willingness of finished products. The Sensory Perception Technologies (SPT) allows textile producers to weave particles of moisturisers‚ deodorants‚ fragrances and even anti-tobacco agents into fabrics. "Early trials have proved SPT a success with many global clothing companies interested‚" ICI‚ whose fragrances unit Quest developed the technology. ICI said the technology allows fabric makers to incorporate tiny
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