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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Glass rod 12. Filter funnel 13. Beaker (80cm3) 14. Beaker (250cm3) 15. KA1 (monobasic acid‚ HX) 16. Methyl orange as indicator 17. Solid sodium carbonate 18. Distilled water Theory: To determine the exact concentration of a monobasic acid‚ HX‚a standard base solution is prepared. Then‚ a certain amount of standard base
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to the addition of corresponding pH indicators and the variation of colors depending on its pH level was used as standards. At the end of the experiment‚ the colors of the unknowns were compared with the standard buffer solutions and then calculated to obtain an estimation of their pH or acidity. Experimental results show that Solution A‚ B‚ C‚ and D‚ have pH levels of 4.9‚ 5.2‚ 4.2‚and 4.9 respectively. Keywords: McIlvaine buffers‚ colorimetry‚ pH indicators‚ Henderson-Hasselbalch equation
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juice‚ and soft drinks? What are common among liquid sosa (drain cleaners)‚ soaps‚ and detergents? Which among these are called acids? Which are classified as bases? In this module‚ you will investigate the properties of acids and bases using an indicator‚ a dye that changes into a specific color depending on whether it is placed in an acid solution or in a basic one. Aside from knowing the uses of acids and bases‚ you will also find out the action of acids on metals and think of ways to reduce the
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use methyl orange and phenolphthalein as indicators to determine accurately the end of an acid-base titration. 2. To present titration data correctly. Observations: Table of Results Showing The Amount Of 0.12 Mol/dm3 Hydrochloric Acid Required to Neutralise 25cm3 Of Sodium Carbonate of an unknown Concentration Using Methyl Orange Indicator. Pipette Solution | Sodium Carbonate | Mol/dm3 | Burette Solution | Hydrochloric Acid | 0.12Mol/dm3 | Indicator | Methyl Orange | | | | Trial 1 | Trial
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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 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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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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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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