NaOH Standardization and Titration of an Unknown Organic Acid Overview: Methods for counting the number of molecules in a sample is a major emphasis of laboratory work. In this experiment we will use the method of titration to count the number of acid molecules in a solution. Measuring mass is a relatively easy procedure to do in the lab (although a balance is expensive). Counting the number of particles requires more effort. Molecular counting can be done by setting an unknown amount of a substance
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DNA is a double helix molecule that contains information that is used to make up a person’s body. DNA controls every aspect of a person’s body from their eye and hair color‚ height‚ and other features. DNA’s specific and unique characteristic can be crucial when solving a crime. DNA can be used to convict a suspect or exonerate an innocent person. When DNA is found it is even more important that is handle properly to ensure proper identification and accuracy of testing. The evolution of DNA technology
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Monoprotic Weak Acid Chemistry Lab 152 Professor: James Giles November 7‚ 2012 Abstract: The purpose of this experiment was to determine the pKa‚ Ka‚ and molar mass of an unknown acid (#14). The pKa was found to be 3.88‚ the Ka was found to be 1.318 x 10 -4‚ and the molar mass was found to be 171.9 g/mol. Introduction Acids differ considerable as to their strength. The difference between weak and strong acids can be as much
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industry of spreading disinformation regarding the safety of their products‚ and public officials of accepting industry claims uncritically. Forty years later‚ we can still find certain parallels between DDT and the use and consequences of other commonly used pesticides today. One of the classes of pesticides of great concern to our wildlife populations‚ as well as predatory Image created by Jason Clay Lewis. d-CON is one of the brands of anticoagulant rat poisons that are of particular concern for our
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What Would You Do? Scenario 1- Della the Delinquent Cat Lady As the president of the board of directors of the cat shelter‚ I am faced with rather or not Ms. Della should remain as part of the staff at the cat shelter. There are several problems that have been brought to my attention and I feel that now is the time to figure out exactly what should be done regarding the matter. After‚ evaluating the situation and giving it a great deal of consideration‚ I have come up several solutions to
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1. Standarization of NaOH with Potassium Hydrogenphthalate (KHC8H404) The hygroscopic nature of NaOH requires its solution to be standardized with a stable primary standard such as potassium hydrogen phthalate. The exact molar concentration of NaOH solution can then be accurately determined. 1.1) Prepare the stock NaOH solution by dissolving about 4 g of NaOH pellet in 100 mL of deionized water. Note that NaOH is a hazardous chemical which is corrosive to skin and irritant to eye‚ be cautious and
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Chemistry A Rap 1 4/6/12 Acid and Base Report If someone were to ask the common teenager in the US‚ “What’s acid?” they would probably respond with something akin to “It’s that one drug that makes you see stuff that isn’t really there and just kinda makes you crazy”. And if that same someone was to ask that same teenager‚ “What’s a base?” their response would most likely have something to do with either baseball‚ or freeze-tag. The thing is‚ most people don’t really understand the most common
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Nowadys‚ indicators have become technologically advanced and can be used for the main purpose of indicating whether something is acidic‚ basic or neutral. This is possible because in solutions of different pH‚ the colour of the inidcator will change simultaneously with pH change. This is made possible by pigments in the indicators. Hand made indicators include universal indicator‚ methyl orange‚ phenolphthalein and many more. Acids and bases are diverse in this world. They are everywhere ranging from
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Acids and Bases Mirza Hasan Mammadov Acids and bases are really important in our daily day life. So let’s start with telling the definitions of them. Starting with acids‚ they are a substance which dissociates in water in order to produce one or more hydrogen ions. Also we can write H+ instead of hydrogen ion. Bases have the same definition‚ although the difference is that it firm hydroxide ions instead of hydrogen ions. We can write OH- instead of hydroxide ion. All alkali is bases but not
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Nucleic Acids Study guide I. Basic Info A. The chemical link between generations‚ the source of genetic info chromosomes B. They duplicate amino acid sequences in proteins C. Serves as Blue print of life II. Make up A. They have three parts • 5 Carbon Sugars • Base • A phosphate group III. DNA (Deoxyribonucleic Acid) A. Has a double helix B. Composed of repeating Nucleotides connected together C. Guanine → Cytosine D. Thymine →Adenine E. Linked by hydrogen bonds F. Sugar
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