Determination of Ka for a Weak Acid Introduction In the experiment preformed the objective is to titrate a weak acid with a strong base. In a titration of a weak acid with a strong base the titrant is the strong base and the analyte is a weak acid. The reaction that will occur is the direct transfer of protons from the weak acid to the hydroxide ion. The data gathered will be represented on the titration curve‚ a graph of the volume of titrant being the strong base plotted against the pH .The
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with fish consumption in men and women: a study of whether gender differences can result in gender-specific confounding. Fish consumption and intake of omega-3 fatty acids from fish are associated with a lower risk of cardiovascular disease. However‚ a prospective study from Sweden has showed that high consumption of omega-3 fatty acids from fish is associated with an increased risk of stroke in men‚ but not in women. The study aimed to determine whether fish consumption is differently related to
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1 Lifestyle‚ health and risk ■ HSW 1.1: Criterion 5 – Water as a liquid at room temperature Criterion 5: Analysis and interpretation of data to recognise correlations and causal relationships Consider the water molecule‚ its properties and its physical state. Water has a relative molecular mass (Mr) of only 18‚ yet it is a liquid at room temperature. This is surprising; it contrasts with other small molecules‚ which are usually gases at such temperatures. Examples include methane (CH4
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A neutralization reaction of ethanoic acid and sodium hydrogen carbonate Cristina Li 17th April 2017 Introduction The hypothesis is the balloon will be bigger and bigger with the increase of vinegar. The chemical reaction between the baking soda and vinegar produces bubbles of carbon dioxide gas as part of this acid-base reaction. Sodium hydrogen carbonate (baking
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more omega-3 fatty acids. What food could the nurse say is a good source of omega-3 fatty acids? a. avocado c. oatmeal b. fatty fish d. whole wheat bread Why the Omega-3 fatty acids are important? There are many health benefits of omega-3 fatty acids. The omega-3s EPA and DHA can help lower triglycerides and blood pressure. And there are studies showing that omega-3 fatty acids may help with other conditions‚ including rheumatoid arthritis‚ depression and many more. Omega-3 fatty acids are considered
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from the biomass. Economics of monoseptic production of microalgae in photobioreactors and the downstream recovery of metabolites are discussed using eicosapentaenoic acid (EPA) recovery as a representative case study. D 2002 Elsevier Science Inc. All rights reserved. Keywords: Microalgae; Phaeodactylum tricornutum; Eicosapentaenoic acid; Process economics; Flocculation; Biomass recovery 1. Introduction Microalgae can be used to produce numerous high-value bioactives (Borowitzka‚ 1986; Bubrick‚ 1991;
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Introduction- Acid rain is created when certain gases are mixed with atmospheric moisture to create precipitation that is more acidic. Naturally occurring sulfur and nitrogen oxides in the atmosphere can vary the acidity level in the rain. Acid rain falls in the forms of rain‚ sleet‚ snow‚ fog‚ gases‚ and particles. The pH scale is what classifies it and it follows a zero to fourteen scale and fourteen being most basic‚ seven being neutral‚ and zero being most acidic. The pH of acid rain is in the
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CHEMICAL REACTIONS: ACID-BASE BUFFERS Short Overview Acids and bases represent two of the most common classes of compounds. Many studies have been done on these compounds‚ and their reactions are very important. Perhaps the most important reaction is the one in which an acid and base are combined‚ resulting in the formation of water (in aqueous solution) and a salt; this reaction is called neutralization. A buffer solution is a solution that contains both an acid and a salt containing
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natural acid‚ citric acid industry has seen a fast growth in China before 2008 due to increasing demand from both of overseas market and domestic market. However‚ in the past five years‚ China’’s Citric Acid production has been expanding slowly due to demand increase very slowly. What’’s more‚ the price of citric acid’s raw material witnessed the uptrend in the same period. What has happened in the citric market in past five years? How is the current competition structure of citric acid in China
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The reaction between alpha-amino acid and ninhydrin involved in the development of color are described by the following five mechanistic steps: alpha-amino acid + ninhydrin ---> reduced ninhydrin + alpha-amino acid + H2O alpha-amino acid + H2O ---> alpha-keto acid +NH3 alpha-keto acid + NH3 ---> aldehyde + CO2 Step (1) is an oxidative deamination reaction that removes two hydrogen from the alpha-amino acid to yield an alpha-imino acid. Simultaneously‚ the original ninhydrin is reduced
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