the SO2 bound in complex compounds in the wine. 3. Fill a burette with standard iodine solution. Record the initial burette reading and the concentration of the solution. 4. To one flask‚ add about 10 mL of 2 M sulfuric acid and 1–2 mL of starch indicator solution. Immediately titrate the mixture with iodine solution. Record the burette reading the moment the mixture turns permanently blue (end point). 5. Repeat the above steps with each of the other two flasks. pH Level Procedure
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the different types of drinking water’s pH levels are. Materials and Methods For the first part of our exiperiment we used the Red Cabbage Indicator. Red cabbage indicator is made by boiling red cabbage to extract the pigments. The red cabbage is filled with anthocyanins‚ therefore it can be used for an indicator. The color of the red cabbage indicator changes with different pH levels. We needed a set of standards to compare our red cabbage and water mixtures with. We used seven different test
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the subject but no complete real answer. According to Katharine Briggs and Isabel Briggs‚ ( Myers and Briggs) there are 16 different types of personalities. With multiple definitions for each of the outcomes it shows. Using the Myers Briggs Type Indicator‚ (MBTI) I will determine what type of personality the main characters are in the book The Lord of Flies. The main character in the story‚ his name is Ralph. He is the main protagonist in the story and the elected leader of the group he is with
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MEASUREMENT WITH INDICATORS Set up two 50 mL test tubes. Label one as an Acid “A” and one as a Base “B” Place 35 mL of the appropriate stock solution into each test tube Add 5 drops of an indicator into each test tube. Record the resultant color for the acid and base. Repeat for the other 4 Acid - Base Indicators PART 2 - ACID/BASE TITRATION PROCEDURE Step 1: Obtain acid‚ in a 100 ml Erlenmeyer flask add 35 ml of an Unknown HCl solution. Step 2: Add an indicator to the acid
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Total Alkalinity Equipment/Glassware: Chemicals: 1 support stand and buret clamp Phenolphthalein indicator 50mL buret 1 50 mL volumetric pipette 0.010 M HCl 1 short stem funnel 10% Thiosulfate indicator Glass stirring rod
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To distinguish between acidic‚ neutral and alkaline solutions using pH values. To classify solutions of equal concentrations in terms of acid or base strength using pH values. To understand how the appropriate use of Litmus paper‚ Universal Indicator and pH meter can give an account of different degrees of accuracy in the measurement of acidity or alkalinity of substances. 1) Define what an Acid is. Give five characteristics of acids. An acid is a chemical which‚ when dissolved in water yields
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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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Virtual Lab Unit 3 1. Briefly describe the steps required to aseptically transfer bacteria from an unknown to a tube of liquid broth. You might have to research this using the "T" button (Tell Me More About...) To aseptically transfer bacteria from an unknown to a tube of liquid broth you have to flame the loop or wire before you begin to sterilize it. You then remove the caps from the tubes and flame the mouths of the tubes to prevent air-borne contamination. When all this is done‚ you have to
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application of Le Chatelier’s principle by observing the effects of acids and bases of on the solubility of Ca (OH) 2‚ the effects on Fe3+ and SCN- with Fe (SCN) 2+ to an equilibrium mixture. Also‚ finding the effects of an acid and base dealing with an indicator‚ and the effect on an acid on Ni2+‚ NH3‚ and Ni (NH3)62+. Data and Data Analysis: • Ca(OH)2 [pic] Ca2+ + 2 OH- Data: You will first add 6 drops of Ca( NO3)2 to a watch glass. Then add 6 drops of HCl then add 6 drops
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accurately one tablet into a 50 cm3 conical flask and dissolve it in 10.0cm3 of 95% alcohol. 3. Titrate with 0.10 mol dm-3 sodium hydroxide solution using two drops of phenolphthalein solution as indicator in the first trial. 4. For the next trials repeat steps 1 and 2‚ but instead of using an indicator use an electronic pH tester to measure the pH of the solution to determine when its neutral; (PH -7) . 5. Record data‚ ml used in titration to neutralize every aspirin trial. Raw Data Collection:
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