known phytochemicals. Some of the well-known phytochemicals are lycopene in tomatoes‚ isoflavones in soy and flavanoids in fruits [2]. To identify this phytochemicals‚ screening must be done. This process includes different methods which are test for pH‚ tannins and phenolic compounds‚ glycosides‚ reducing substances‚ alkaloids‚ plant acids‚ saponins‚ unsaturated stearols and triterpenes‚ flavones/ flaonols‚ flavonoids‚ and for carbohydrates. Prior to screening‚ sample would be obtain from the leaves
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peelings extract as a pH indicator. It is proposed to turn out to be extremely beneficial to schools‚ lessening the need to buy costly laboratory equipment such as litmus paper. HYPOTHESIS: I therefore hypothesize that eggplant peelings extract‚ after meticulous testing and improvising‚ could be an effective pH indicator. Variables: INDEPENDENT: The color of the eggplant peelings after being dipped in the acid/base‚ to observe its efficiency in being a pH indicator. It changes depending
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Chemistry Experiment Double Indicator Titration 1 Aim The purpose of this experiment is to find the composition of a sample of sodium carbonate mixture by titration. Introduction The reaction between sodium carbonate and hydrochloric acid occurs in 2 stages‚ with the formation of hydrogen carbonate ion as the intermediate product. Na2CO3(aq) + HCl [pic] NaHCO3(aq) + NaCl(aq) NaHCO3(aq) + HCl(aq) [pic] NaCl(aq) + H2O(l) + CO2(g) [pic] Requirements Hydrochloric
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Hydrochloric acid + blue dye 5. Blue dye + Sodium Hypochlorite. Observe & add 1 drop of hydrochloric acid. 6. Potassium iodide + Lead Nitrate. A precipitate should form. 7. Sodium hydroxide + phenolphthalein. a. Phenolphthalein is an acid-base indicator. 8. Hydrochloric acid + phenolphthalein. a. What color would be expected when combining phenolphthalein with an acid or with a base? 9. Sodium bicarbonate + Silver nitrate 10. Silver nitrate + Ammonia a. Using a paper towel‚ absorb the mixture
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strong base! ! Known: Acid! Unknown: Base HCl NaOH Volume! 25.00 mL 18.66 mL Molarity 0.1396 M Uknown Name! Indicator ! Methyl Orange! Turned red when mixed with the acid solution.! After adding 18.66 mL of base‚ turned orange. After having added the correct amount of base to the acid solution mixed with indicator‚ we can calculate the concentration of the base solution.! CAVA = CBVB! CB = CAVA / VB! CB = 0.1396M x 25.00 mL / 18.66 mL! CB = 3.49 M
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The Myers Briggs Type Indicator (MBTI) is a personality test used both in professional and personal life to identify the psychological type an individual. It is used by the vast majority of employers‚ and is known as the world’s most popular personality tool. The MBTI test was first published in 1943‚ and initially established by Katharine Cook Briggs and her daughter Isabel Briggs Myers. Briggs and Myers’ model is based on personality theories and ideas of Carl Jung‚ a well-known Swiss psychologist
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Equilibrium and LeChatelier’s Princinple Objective: Put stresses on the systems; observe how the equilibrium’s systems react to a stress. Materials and Procedures: A. Materials 1. NaCl(s) 2. KSCN‚ 0.002M 3. Bromythymol blue indicator solution 4. AgNO3‚ 0.1 5. CoCL2 x 6H2O(s) 6. HCl‚ 12M 7. HCL‚ 0.1M 8. NaOH‚ 0.1M 9. Fe(NO3)3‚ 0.2M 10. C2H5OH(l) 11. Na2HPO4(s) 12. Test tubes 13. Beaker 14. Stirring
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prediction; information you have researched before Diffusion refers to the passive movement of molecules along the concentration gradient. In this case we will be looking at the diffusion of acid in agar blocks. Agar is a jelly like substance and the indicator methyl orange is added which will turn red in the presence of acid. Hence we can measure the time taken for the colour change to calculate the rate of diffusion of hydrochloric acid in agar blocks. Variables Independent variable Concentration
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As the area to volume ratio increases‚ the time taken for a complete diffusion will also increase. Background Information: Agar is a jelly like substance and in this experiment‚ agar will be used is containing and acid-base indicator called “phenol” and the indicator gets the red color in basic conditions whereas it gets yellow color in acidic ones. Control Variables: * The same agar will be used for each experiment * All the experiments will be investigated in the same place
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(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 blue to a new set of the acid samples in separate test tube. Record your observation *
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