4-Dibromoanisol‚ was prepared in a yield of 52% with a melting point of 55-58 C . Reaction: Mechanism: Procedure: Anisole (0.35mL‚ 0.0378mol) was obtained and placed in a pre-weighed 25 mL round bottom flask‚ along with 2.5 mL of glacial acetic acid and a magnetic stir bar. Then the reaction apparatus was assembled‚ the dry tube was charged with conc. sodium bi sulfate‚ the 25 mL round bottom was attached to the apparatus‚ and 5 mL of Br2/HBr mixture was obtained and placed in the round
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Formic acid is known to be the simplest carboxylic acid‚ and it is an important factor in chemical synthesis and occurs naturally. The chemical formula for Formic Acid is CH202‚ and is mostly found in the venom of bee and ant stings. Formic acid is clear and colorless with a pungent odor. Formic acid is used in many ways; Formic acid is used to preserve livestock. It is also sprayed on animal food and fresh hay to reduce the decay rate. It can also be used as a pesticide to protect bee
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litmus paper did not turn blue No presence of Nitrogen Test for Halogens Beilstein Test Copper wire + Flame No Green flame No presence of Halogen Silver Nitrate Test Heat + AgNO3 No white precipitate No presence of Halogen Test for Sulfur Diluted Acetic Acid + Lead Acetate + Heat No brown precipitate formed No presence of Sulfur Table 6.5Qualitative Tests for Functional Group Test for Alcohol: Chromic Acid Test Sample Treatment Observation Inference Unknown Sample 5% K2CrO7 + 5% H2SO4 + Heat
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CORROSION OF CEMENT PASTE In general terms cement products have good durability‚ but their strength will decrease or even damage structures with the role of some erosive media (such as soft water‚ acid water)‚ known as the erosion of cement paste. The main reasons for corrosion are: Soft-water Corrosion (Dissolution Corrosion) Rain‚ snow‚ distilled water‚ industrial condensate water‚ and the river water and lake water with low bicarbonate content‚ all of them belong to soft water. When hardened
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cause severe skin burns‚ here are some examples: nitric acid (HNO3)‚ hydrochloric acid (HCl) and sulfuric acid (H2SO4). The weaker ones are less corrosive and when in touch with the skin‚ usually do not cause burns‚ for instance some weak acids are: acetic acid (vinegar- CH3COOH)‚ citric acid (C6H8O7) and tartaric acid (C4H6O6). In this investigation I will be focusing in the sulfuric acid and carbonate reaction. Aim: Stronger acids are more reactive. The purpose of this investigation is to make sure
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II. Rationale The history and usage of ink can be traced back to the 18th century B.C.‚ with the utilization of natural plant dyes‚ animal and mineral inks based on such materials. Ink is a pigment in a liquid form or paste form used as colorants and dyes. Ink provides much of the color on paper in the modern world and has many uses in different cultures around the globe. Also‚ they are becoming more and more expensive because of their increasing purposes. Although ink is universally available
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A simple‚ rapid‚ specific and highly sensitive spectrofluorimetric method has been developed for the quantification of dabigatran etexilate mesylate (DAB) in bulk and capsule dosage form. A linear relationship was found between fluorescence intensity and DAB concentration in the range of 0.01-1.0 μg/ml in DMSO as solvent at an emission wavelength of 391 nm after excitation at 334 nm‚ with a good correlation coefficient (0.989). The detection and quantification limits were found to be 0.005 and 0
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Friedel Crafts synthesis of 1‚4-di-t-butyl-2‚5-dimethoxybenzene Substance Molecular Weight (g/mol) Amount Used Moles Used Mole Ratio Melting Point (°C) Boiling Point (°C) Density (g/mL) 1‚4-dimethoxybenzene 138.16 0.128g 9.26*10-4 1:1 58-60 N/A 1.053 Acetic Acid 60.0 ~15 drops N/A N/A N/A 118 1.049 t-butyl alcohol 74.12 0.200mL 2.12*10-3 2:1 N/A 83 0.7856 H2SO4 98.06 ~15drops N/A N/A N/A 327 1.84 Methanol 32.0 ~6mL N/A N/A N/A 64.7 0.7914 Water 18.0 5mL N/A N/A 0 100 1.0 1‚4-Di-t-butyl-2‚5-dimethoxybenzene
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should the molarity of the stock solution be? B) If the chemist wants to prepare 5.00 L of the stock solution from concentrated H2SO4‚ which is 18.0 M‚ what volume of concentrated acid should be used? 4. To what volume should 1.19 mL of an 8.00 M acetic acid solution be diluted in order to obtain a final solution that is 1.50 M 5. What volume of a 5.75 M solution be used to prepare 2.00 L of a 1.00 M solution? 6. A 25.00 mL of ammonium nitrate solution produces a 0.186 M solution when diluted with
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SCH 4U1 FINAL EXAM REVIEW ATOMIC STRUCTURE AND MOLECULAR ARCHITECTURE 1. Describe the wave mechanical model of the atom. 2. Write the ground state electron configuration for Br. 3. Explain why the first ionization energy for Ne is significantly greater than Na. 4. Distinguish between ionization energy and electronegativity. 5. How does VSEPR Theory account for the fact that the bond angle in H2O is less than NH3? 6. Which of the following molecules are polar? Include diagrams
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