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Identify Mystery Liquid - Essay Example

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DOCUMENT A In PH approximation of various solutions we normally used indicators. In this particular Lab, we will make an acid base indicator using red cabbage then use it in determination of the approximate values of PH corresponding to various household liquids (Helmenstine 7)…
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Download file to see previous pages Handle hot beakers using beaker tongs. 2. Wear protective gear: gloves and overall. 3. be cautious while handling solutions such as drain cleaners since they are caustic. 4. Avoid eye and skin contact with the chemicals. 5. Wash out any contact with the chemicals with large quantities of water. Procedure: 1. Chop red cabbage into small pieces and place them in a 100-mL beaker and add 30 mL of distilled water. 2. Place the beaker on a hot plate, and allow the water to boil until a deep purple color appears. Using beaker tongs, carefully remove the hot beaker from the hot plate give it time to cool then transfer the red cabbage indicator to a clean beaker. 3. Place a clean microplate over a piece of white paper. Using pipets add 5 drops of lemon juice to L1; drain cleaner to L2, and Anti-freezer to L3. For each solution Use a clean pipet. 4. Draw the red cabbage indicator into a clean pipet, and to each solution L1-L3 add 5 drops of the red cabbage indicator. Stir the solutions carefully using a stirring rod. 5. By clearly observing the three solutions, record the color changes in the data table. With reference to the color chart, record the approximate PH of every solution. Acid & Base Observations Solution color Approximate PH Inference Lemon Juice Light red 2 slightly acidic Drain Cleaner Yellow 13-14 Basic Anti-freezer Green 10.5 basic Conclusion From the above observation it very clear that the liquid found by Mr. Fischer was likely to be lemon juice and not drain cleaner or anti-freezer. Explanation Drain cleaner was found to have a PH of 13-14 which depicted a basic solution. The anti-freezer was found to have a PH of 10.5 depicting a basic solution too. Lemon juice was the only liquid found to be acidic. Lemon juice Corresponded to the liquid found in such a way that its acidic nature would corrode metals. DOCUMENT B pH OF COMMON SUBSTANCES WITH THEIR IUPAC NAMES: pH OF COMMON SUBSTANCES pH [H 3 O + ], M Example 0 1.0 Battery acid, 1 M sulfuric acid 1 1 ? 10 ?2 Lemon juice 2-hydroxypropane-1,2,3-tricarboxylic acid 2 1 ? 10 ?3 Vinegar impure dilute acetic acid 3 1 ? 10 ?4 Soft drink sodium bicarbonate 4 1 ? 10 ?5 Rain water H2O 5 1 ? 10 ?6 Milk Lime calcium hydroxide 7 1 ? 10 ?8 Baking soda, sodium bicarbonate 8 1 ? 10 ?9 Washing soda, Na 2 CO 3 sodium carbonate 9 1 ? 10 ?10 Anti-freezer ethylene glycol 10 1 ? 10 ?11 Aqueous household ammonia, NH 3 11 1 ? 10 ?12 Limewater, aqueous solution of calcium hydroxide Common household chemicals (Katz 2-4) DOCUMENT C A household hazardous waste that can be identical to the liquid found in the house must have acidic properties, meaning that it may corrode metal containers and turn red cabbage indicator juice red. Corrosive substances can eat into skin and metal therefore they need to be handled with care and disposed correctly (Carboni 12). In this case we consider Vinegar which made from fermented wine, apple juice, or grain. Vinegar is made up of 5 percent acetic acid, thus it turns out to be mild acid. Vinegar has the capability to dissolve grease, mineral deposits, get of rid soap traces, deodorize, take out mildew or wax backlog, and refine some metals. Vinegar is able to clean stone or brick, and is used in making some carpet cleaning agents as an ingredient. Vinegar can be ...Download file to see next pagesRead More
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