Ester water Particularly‚ 1-hexanol was reacted with an excess of acetic acid‚ using an acid catalyst to yield its ester: hexyl acetate. The reaction was performed under reflux which sped up the reaction by continuous vapor-condensation cycles of the solution mixture as the solution boiled. The vapors were blocked from escaping the solution by a stream of cold water running up the
Premium Acetic acid Carboxylic acid Acid
t Design and preparation of buffers effective at different pHs Abstract These experiments aimed to determine the optimum pH ranges various buffers are effective and provide opportunity for the use of the Henderson-Hasselbalch equation to prepare a buffer of a specific pH. Three different buffer systems were initially investigated; volumes of weak acid and weak bases of specified concentration were prepared and titrated against strong acid or strong base solutions with pH readings taken at frequent
Free PH Acid dissociation constant Buffer solution
dissolves like”‚ fluorene dissolves with the non-polar heptane and the polar fluorenone dissolves in the polar ethyl acetate solvent. This phenomenon was illustrated in class before the experiment‚ when it was pointed out why water will not dissolve fluorene‚ fluorenone‚ or transstilbene as readily as a nonpolar solvent such as heptane or toluene‚ or a polar eluent such as ethyl acetate. Those solvents have a much more similar structure to the solutes‚ whereas water’s structure is much different‚ making
Premium Oxygen Chemistry Distillation
from the molecule by ionization: CH3CO2H → CH3CO2- + H+ Because of this release of the proton (H+)‚ acetic acid has acidic character. Acetic acid is a weak monoprotic acid. In aqueous solution‚ it has a pKa value of 4.75. Its conjugate base is acetate (CH3COO−). A 1.0 M solution (about the concentration of
Premium Acetic acid
of sodium ions and bicarbonate ions. These two solutions mixed together produce two separate reactions. The first is an acid-base reaction producing carbonic acid (H2CO3) and sodium acetate(CH₃COONa). The second is a decomposition reaction of carbonic acid to produce water (H₂O)‚ carbon dioxide gas (CO₂). Sodium acetate is the sodium salt of acetic acid. The balanced equation for this reaction
Premium Chemistry Stoichiometry Yield
Introduction Metallic yarns or threads‚ in general‚ have been known for more than 3000 years. Gold and silver were hammered into extremely thin sheets‚ then cut into ribbons and worked into fabrics. These were the first ‘man made’ fibres‚ which came thousands of years before nylon or rayon. The Persians made fabulous carpets with gold thread and the Indians‚ ornamental sarees with it. The metal threads were twisted‚ doubled or wrapped around some other thread such as cotton. With the advancement
Premium Textile Metal Copper
The pH of various mixtures and find the dissociation constant of acetic acid Chemistry (HL) Research Question: To determine the pH of various mixtures of sodium acetate and acetic acid in an aqueous solution and hence to find the dissociation constant of the acetic acid. Background: The mixture of sodium acetate and acetic acid in aqueous solution is a buffer solution. Buffer solutions are the solutions which resist a sudden change in the pH due to addition of small amounts of strong acid or base
Free PH Acid dissociation constant
ABSTRACT Purpose: To evaluate the antifungal and cytotoxicity activity of four medicinal plants like Mystroxylon aethiopicum‚ Lonchocarpus capassa‚ Albizia anthelmentica and Myrica salicifolia. Methods: Microdilution method and brine shrimp lethality test were employed to evaluate antifungal and cytotoxicity of plant extracts. Results: Lonchocarpus capassa leaf extracts exhibited antifungal activity against tested fungal strains with MIC range of 0.78 – 3.125 mg/mL with LCLA extract inhibiting C
Premium Bacteria Microbiology Antibiotic resistance
used to hold this extraction and 5 mL of ethyl acetate will be passed through SPE column‚ to obtain and remove the caffeine from the SPE column. A small one-armed Erlenmeyer flask containing 5 mL of ethyl acetate along with the compound caffeine‚ should be the result after using the SPE column
Premium Caffeine Tea Water
Preparation of Synthetic Banana Oil September 20th‚ 2012 Purpose: The main purpose of this experiment was to synthesize banana oil (isopentyl acetate.) Ester are often prepared by the Fischer esterification method‚ which involves heating a carboxylic acid with an alcohol in the presence of an acid catalyst. Theory: Synthesize isopentyl acetate by combining isopentyl alcohol with acetic acid and sulfuric acid and then heating the reaction mixture under reflux for an hour. The alcohol is the
Premium Acetic acid Distillation Ester