value of substances & estimate the pH value by using the universal indicator. 2. Use the indicator to identify acidic‚ basic‚ and neutral substances found in any home 3. Classify household items as acids and bases 4. Collect organise and analyse results in tables and graphs (if necessary) 5. Analyse results and explain the reason the substances have the pH obtained. Aim – To use a universal indicator to measure the pH of various household substances and to identify acidic
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A B C D E F Bromothymol Blue Universal Indicator Phenolphthalein Litmus Paper Analyze: 1) F‚ C‚ D‚ B‚ A‚ E 2) D is neutral because it turned to the colour of green when it came in contact with the indicator Bromothymol Blue. The acid or base is green between 6.0-7.6 pH. 3) Solution E is more alkaline (more basic) than solution A because when E came into contact with the indicator Bromothymol Blue it turned into a darkish blue colour while A turned into
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Lab Report: Acid and Base Indicator Lab The title of my lab report is “Acid and Base Indicator Lab” this lab is testing what household solutions area bases depending on what color they changed. You have to use the pH balance scale to determine Acid‚ Base‚ and Neutral. On this lab we used 7 different solutions to determine if it’s either base‚ acid‚ and neutral. These are ammonia‚ vinegar; drain cleaner‚ soft drink‚ baking soda‚ detergent‚ and lemon juice are the solutions that are going to be
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become a stock culture to prevent the shortage of slants during performing the series of tests. Kliger’s Iron Agar tests can be used to determine multiple characteristics of unknown microorganism #17. Kliger’s Iron Agar slants also contains a pH indicator‚ phenol red‚ which can be used to test the presence of fermentation. If there is a glucose or lactose fermentation‚ the acid will be produced‚ and the color will change from red to yellow. If there is only glucose fermentation‚ the slant will have
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concentration of an unknown solution by reacting a strong acid with a strong base. Titrations are hard to accomplish‚ though‚ due to the fact that indicators used to show the endpoints are very sensitive and one drop could make the solution titrate past its endpoint. Blue stock solution: 3 mg/L Yellow stock solution: 35 mg/L Phenolphthalein is the indicator used (6 drops per titration) Molarity of NaOH used: .05056 M Start with 25 mL green Kool Aid Dillution factor: 100mL/25mL green Kool Aid= 4
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4.3 Exercise 4 - Titrations and indicators 1. 20 cm3 of methanoic acid (Ka = 1.8 x 10-4 moldm-3) of concentration 0.10 moldm-3 is titrated against sodium hydroxide of concentration 0.05 moldm-3. a) Calculate the pH of the solution: i) initially ii) after 10 cm3 of the alkali has been added iii) after 20 cm3 of the alkali has been added iv) after 30 cm3 of the alkali has been added v) after 50 cm3 of the alkali has been added b) Sketch a pH titration
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Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte (wekipedia). The first step will be measuring and combining water and acid (Hydrochloric acid). An indicator anthocyanin will be added to the solution to change the color to pink. Anthocyanin is a water-soluble vacuolar pigment that may appear red‚ purple‚ or blue depending on the pH (Wikipedia). This pink color acts as a pH meter and will show a change
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because they make the investment in getting to know their team. As an aspiring talent leader‚ you don’t have to be a mind reader to get a sense of your employee climate. In fact‚ the Myers Briggs test is a great place to start. The Myer-Briggs type indicator (MBTI) is a personality assessment that scores individuals‚ assigning them 4 letters. The Myers-Briggs Foundation explains the 4 functions as: • Favorite world: Do you prefer to focus on the outer world or on your own
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the reaction between potassium hydroxide and hydrochloric acid : KOH + HCl .The equivalent point of a strong acid or strong base will occur at pH7 . However‚ for the weak acids and bases ‚ the equivalent point will usually no occur at pH 7 .The indicator can be used to estimate the equivalent point by observing the colour change of solution. Objective: To analyze a solution of potassium hydroxide using standard hydrochloric acid theory . Materials: potassium hydroxide distilled
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Complexometric Determination of Water Hardness Chris Breault 2/4/2013 Abstract: Unknown sample #94 was titrated using disodium EDTA to standardize‚ and Erichorchrome Black T as the indicator. Sample 94 was found to have an average water hardness of 268.2 ppm. Introduction The experiment uses disodium salt of EDTA to determine the concentration of metal ion impurities in hard water by complexometric titration. Water gathers impurities by dissolving salts in the earth. The amount of impurities
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