EXPERIMENT 2 ACID DISSOCIATION CONSTANT OF AN INDICATOR DYE OBJECTIVES Using spectrophotometric method: determine the wavelengths at which the acid and base forms of the dye in aqueous medium exhibit maximum absorption; determine the molar absorptivities of the acid and base forms of the dye and estimate an unknown concentration of the dye in solution using the Beer-Lambert’s Law; and determine the acid dissociation constant of the indicator dye. THEORY The absorption or reflection of
Free PH Acid dissociation constant
Abstract The bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure and its mechanism. After the addition of bromine to trans-cinnamic acid‚ the product was identified by its melting point and infrared spectrum resulting in erythro-2‚3-Dibromo-3-phenylpropanoic acid after comparing similar properties. Introduction In this lab‚ the bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure‚ and from there determine
Premium Solvent Acetic acid Ethanol
involve the reaction of an acid and a base to produce a salt (ionic compound) and water. Acid + Base ( Salt + Water □ In this lab‚ sulfamic acid (a weak acid which contains one acidic hydrogen) will be used: H2NSO2OH(aq) + NaOH(aq) ( NaOSO2NH2(aq) + H2O(l) (Net Equation: H+(aq) + OH-(aq) ( H2O(l)) □ Titration is a process of neutralization □ Titration is commonly used to determine the concentration of an acid or base in a solution.
Free Titration Acid PH
Title: ACID BASE TITRATION. Objectives: 1. To determine the concentration of acid using titration. 2. Skills of titration techniques. Apparatus: 1. 250 volumetric flask 2. 10mL measuring cylinder 3. 25mL pipette 4. 50mL burette 5. 250mL beaker 6. 150mL conical flask 7. Retord stand 8. White tile 9. Stopwatch 10. Pipette bulb Chemicals: 1. HCl solution 2. 0.1M NaOH solution 3. H2SO4 solution 4. Distilled water 5. phenolphthalein Introduction
Premium Titration PH
Techniques 3rd Edition (2011) ** Students MUST obtain a copy of the textbook Synopsis This is an organic chemistry practical course which reinforce the theory and concepts studied in Organic Chemistry 1 (CHM456). It covers the learning of simple laboratory techniques such as reflux‚ distillation‚ extraction‚ crystallization and melting point determination‚ preparations of organic compound and separation of mixtures. The Techniques Students are REQUIRED to read and understand the various techniques
Premium Distillation Chemistry Benzene
Tossed Salad Vs. Melting Pot In discussions of tossed salad and melting pot‚ a controversial issue is whether or not tossed salad is better than melting pot. Tossed salad represents multiculturalism. The tossed salad is colorful and it has unique and different ingredients it has the tomatoes‚ the lettuce‚ the cucumbers‚ the red and green and orange bell peppers and other ingredients. Each ingredient has its own unique color‚ texture and taste. What unites all these ingredients though is the
Premium Culture Multiculturalism Cultural assimilation
AMINO ACIDS BY MEANS OF TITRATION CURVE ABSTRACT The aim of the experiment was to identify an unknown amino acid through acid-base titrations which was prepared in water to form an acidic solution. Each group prepared unknown amino acid hydrochloride. The pre-prepared basic solution was slowly added to the amino acid solution and pH change was closely observed using the pH meter. During these titrations the amino acid converted from cation to zwitterion to anion; zwitterion is an amino acid with
Premium Amino acid PH Acid
Figure 1: Formation of benzocaine from p-aminobenzoic acid Experimental P-aminobenzoic acid (1.211g) and absolute ethanol (15mls) were combined with three boiling chips in a 50ml round bottom flask. The round bottom flask was placed on a heating plate and was refluxed starting at 109 ̊C. The solution began boiling at 111 ̊C. It was allowed to reflux for approximately 30 minutes and the solid was dissolved. The round bottom flask was then placed in an ice bath and allowed to cool to
Premium Water Distillation Ethanol
Response Paper 2: The “Melting Pot” Metaphor and Popular Culture People commonly describe America as a “melting pot” because it consists of a variety of cultures that all mesh together to form a cohesive‚ united whole. However‚ the analogy can prove to be problematic and inaccurate to describe American society when looking at the big picture. The problem with comparing American culture to a melting pot is that “it has never adequately captured the diverse experiences of exclusion and adjustment
Premium United States Culture Melting pot
Salad Bowl vs. Melting Pot There have been many to question and many so called answers to the merging of America and its different citizens. One cannot choose which term is better than the other; they both serve the same cause just in a different example. Along with this perspective‚ however‚ there is another expression that describes the diversity of people in America. It tends to be interpreted in the same way as the “melting pot‚” but actually has a slightly different meaning with a different
Premium United States