are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created from methyl iodide and magnesium metal. It acted as the Grignard Reagent in Part B upon which it was reacted with benzoin to create 1‚2-diphenyl-1‚2-propanediol. A racemic mixture of benzoin was used‚ and such theoretically both diasteriomers of the diol could
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1 2 Initial Burette Reading (mL) 25.00 18.50 Final Burette Reading (mL) 49.80 43.50 NH4OH used (mL) 24.80 25.00 Average Titre Volume (mL) Table 1.2 : Volume of 0.1M of NH4OH used to titrate 25mL of 0.1M of HCl using screened methyl orange as indicator. B. Weak acid-strong base titration 1 2 Initial Burette Reading (mL) 15.10 13.30 Final Burette Reading (mL) 40.30 38.70 NaOH used (mL) 25.20 25.40 Average Titre Volume (mL) Table 2.1: Volume of 0.1M of NaOH
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the reaction of carboxylic acids and alcohols‚ with an inorganic acid used as a catalyst which is dubbed esterification. With o-hydrobenzoic acid‚ or salicylic acid‚ we are able to create acetylsalicylic acid otherwise known as aspirin as well as methyl salicylate‚ which is a component of oil of wintergreen. Both of which are used for pain relief/soreness. Salicylic acid is a member of the phenol class as their hydroxyl group (OH) is attached to a phenyl ring (benzene) and many phenols react with
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this procedure were benzophenone‚ malonic acid‚ and biphenyl. These three solids were then mixed with water (highly polar)‚ methyl alcohol (intermediately polar)‚ and hexanes (nonpolar). When benzophenone is mixed with water the results turned out to be insoluble because benzophenone is a pure hydrocarbon‚ which are very insoluble in water. When benzophenone was mixed with methyl alcohol‚ it was soluble because Methanol can hydrogen bond to the carbonyl oxygen of benzophenone. When benzophenone was
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Synthesis of Salicylic Acid Experimental Data: 1. Mass of methyl salicylate used: 0.232 g 2. Theoretical yield of salicylic acid: 0.211 g 3. Volume H2SO4 added‚ with units (drops or mL): 3mL 4. Mass of crude salicylic acid obtained: 0.250 g 5. Volume of water used as recrystallizing solvent: 2 mL 6. Mass of purified salicylic acid: 0.134 g 7. Percent yield of purified salicylic acid from reaction: 63.5% 8. Melting point of purified product: 158-160 oC 9. Name of NMR solvent used and
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The mass of watch glass‚ g | 36.2842 | The mass of watch glass with product‚ g | 39.9803 | The mass of product‚ borix acid‚ g | 3.6961 | Test | Result | Boric acid is dissolved in water and methyl red indicator is added. | Pink solution is observed | Mannitol is dissolved in water and methyl red indicator is added. | Pink solution is observed | Both solution is added together | The colour of solution remain unchanged | A little methanol and concentrated sulphuric acid is added to boric
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mistakes that may have been made during the titrations. II. Results A solution of “stomach acid” was created by mixing .6M (moles/liter) hydrochloric acid (HCl) with distilled water to create a solution with a volume of 75 milliliters (mL). Methyl red‚ an indicator that changes colour at a pH of 4.2-6.2‚ was added in order to determine the equivalence point (when amount of acid equals amount of base) of the titration. This was then titrated to the end point (the indicator’s colour change)
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over-titration had occurred | | 11.10 | 12.90 | 1.8 | | | 12.90 | 14.40 | 1.5 | | | 14.40 | 15.90 | 1.5 | | Methyl Orange | 15.90 | 16.90 | 1.0 | Reaction occurred quick‚ over-titration occurred and solution turned from red to orange | | 16.90 | 17.20 | 0.3 | | | 17.20 | 17.40 | 0.2 | | | 17.40 | 17.60 | 0.2 | | | 17.60 | 17.80 | 0.2 | | Methyl Red | 0.00 | 5.00 | 5.0 | | | 5.00 | 7.80 | 2.8 | Solution turned from red to a light orange/yellow color | | 7.80
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Introduction Methyl Salicylate has been used for a long time for its pleasant odour and flavour. The objective of this experiment was to carry an organic synthesis; the preparation of salicylic acid from methyl salicylate. To do an organic synthesis‚ it is needed to chemically modify the molecules of another compound to end up with the desire compound. Methyl salicylate is the major constituent of wintergreen oil‚ which is why it was used in this experiment as the starting material. The new technique
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Magnolia claim that there is a big difference between real fruit drinks that contains at least 10% real juice and artificial fruit drinks which contain less than 10% and depend more on artificial flavoring and chemical preservatives such as sodium benzoate to keep some products from easily spoiling. You are a marketing manager of zest – o‚ what would you do to the public challenge of magnolia assuming: a. You don’t have at least 10% juice content b. You have at least 10% juice content A
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