was to compare how side chains alter the ionizability of our three amino acids: alanine‚ aspartic acid‚ and cysteine. More specifically‚ we wanted to observe how a thiol group and a carboxyl group affected the ionizability of the rest of the amino acid. Because alanine contains a single methyl group on its side chain‚ we can easily compare the functional groups of aspartic acid and cysteine to it because both aspartic acid and cysteine start their side chains with a methylene group and then go on
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Experiment 11 Title: Spectrophotometric analysis of caffeine and benzoic acid in soft drink. Name: Tan Herh Lim Name of partner: Sia Ting Wai‚ Chong Zheng Yee Date: Lecturer: Dr. Neo Kian Eang Practical class: P1 Objective: To obtain the absorbance of the caffeine and benzoic acid in soft drinks. Introduction Soft drinks that commonly found in our daily life contain caffeine and sodium benzoate. The caffeine act as a stimulant and the sodium benzoate acts as a preservative
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of Bromine to trans-Cinnamic Acid Introduction/Abstract: The purpose of this experiment was to carry out the bromination of trans-cinnamic acid‚ to determine the stereochemistry of the dibromide product of 2‚3-dibromo-3-phenylpropanoic acid‚ and find out whether the reaction proceeds by the usual bromonium ion mechanism or some other mechanism. In this experiment trans-cinnamic acid was mixed with glacial acetic acid and stirred in which then bromine/acetic acid solution was added to the mixture
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CHM456 ORGANIC CHEMISTRY 1 LABORATORY Contact hours: 3 hours/week Laboratory textbook: Pavia‚ Lampman‚ Kriz and Engel‚ Introduction to Organic Laboratoy 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
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Acid Rain Lab Acid rain is causing problems throughout the world. Acid rain is precipitation that has been combined with gases in the atmosphere‚ causing it to be slightly more acidic than normal rain. Acid rain has a PH level of about 5.0 compared to that of pure water’s 7.0. Acid rain is caused uniquely by human from such harmful wastes as the burning of fossil fuels. This type of rain is carried throughout the atmosphere‚ for hundreds of miles‚ harming countryside. The real question is whether
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a reaction between calcium carbonate and hydrochloric acid‚ the products calcium chloride‚ carbon dioxide and water are formed. I predict that the higher temperature of HCl acid‚ the higher the reaction rate will be‚ this is because at a higher temperature there will more fast-moving hydrochloric acid molecules per set volume. This means that there will be a higher chance of the calcium carbonate molecules colliding with the hydrochloric acid and reacting‚ with enough energy to break the activation
Free Chemical reaction Chlorine Carbon dioxide
A pumpkin is a gourd-like squash of the genus Cucurbita and the family Cucurbitaceae (which also includes gourds).[1] It commonly refers to cultivars of any one of the species Cucurbita pepo‚ Cucurbita mixta‚ Cucurbita maxima‚ and Cucurbita moschata‚ and is native to North America. They typically have a thick‚ orange or yellow shell‚ creased from the stem to the bottom‚ containing the seeds and pulp. Pumpkins are widely grown for commercial use‚ and are used both in food and recreation. Pumpkin pie
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addition‚ it is calmly captivated by the scalp and hair‚ so it doesn’t get adhesive and leave a mess. Stimulates hair growth Enhance the advance of hair on the scalp in an amount of ways. Among these is through the Omega3‚ Omega6 and Omega9 fatty acids‚ which are all-important in aesthetic growth. Provides growth to the hair The oil as well improves claret apportionment on the scalp Ensures the hair follicles are nourished abundant to help hair growth. Strengthens hair to abate breakage Provide
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Experiment 7 INVESTIGATING STOICHIOMETRY WITH SODIUM SALTS OF CARBONIC ACID Introduction In this experiment we are going to get a better understanding of chemical stoichiometry. We are going to be reacting sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) with hydrochloric acid (HCl). To start off the mass of two unknown substances (being the sodium bicarbonate and sodium carbonate) will be taken. We will need to construct balanced equations for both of the reactants with the HCl and
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Isolation of Trimyristin from Nutmeg and preparation of Myristic Acid from Trimyristin by Hydrolysis Introduction Over 40% of medicinal chemicals in the world were developed from isolation of the natural source. These sources were from fungi‚ plants‚ bacteria‚ animals‚ etc. The techniques used to isolate and purify has been by extraction‚ distillation‚ recrystallization‚ and chromatography. In this experiment we will be trying to obtain a pure organic compound from a natural source. Because this
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