Worksheet - Acids‚ Bases and Salts 1. I am pure water. When heated my pH (increases‚ decreases)‚ because more of my water molecules dissociate. 2. I am a 0.020 M solution of weak acid‚ HA. If I only dissociate to the extent of 1.50%‚ what is the value of my Ka? 3. I am a 0.20 M solution of hydrocyanic acid‚ HCN‚ with a Ka of 4.93 x 10¯ 10 . What is my pH? 4. I am a buffer made from 0.10 M acetic acid and 0.15 M sodium acetate. If the Ka for acetic acid is 1.77 x 10¯ 5 ‚ what is my pH? 5. I am
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Drug-Free Workplace Evaluation “At-risk‚ though circumscribed‚ segments of the U.S. workforce were identified with prevalence rates up to 55.8% for any use of illicit drugs and up to 28.0% for illicit drug use in the workplace” (Frone‚ 2006‚ p. 856). Substance abuse affects many in the workplace‚ and the individual’s drug or alcohol mistreatment has a harmful impact in various division of the workplace. Workers who dependent on drugs or alcohol can demonstrate low enthusiasm and be deficient in awareness
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Experiment 55: A Separation and Purification Scheme The final lab report/procedure write-up will consist of the following: Report guide: 1. List the names‚ structures‚ and amounts of each compound in your mixture. 2. Draw a flow chart (like pg 687 in PLKE) showing how you separated and isolated your two compounds. Be sure to include the structures of the compounds at each step. 3. Write a procedure. This should include exactly how you performed your separation. It should have enough
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Abstract The objective of this experiment was to observe multi-step purification of benzoic acid after performing the extraction from a mixture containing benzoic acid‚ cellulose‚ and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have
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Addictions Substance and Behavior What is addiction? There are many definitions and classifications‚ but what it comes down to is: “the person loses control over their use of the substance or behavior‚ and importantly‚ they are aware of that loss of control.” Addiction is a euphoric feeling one may get from a behavior or substance. Addiction is a mental concern which researchers have related with dopamine levels in the brain. An experiment taken place in 2009 with Dr. Nora Volkow at the National
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STANDARDIATION OF ACID AND BASE Eunice Ivy B. Gamboa ABSTRACT Solutions of known concentration are prepared by dissolving measured masses of standard acids in distilled water. The concentrations of unknown solutions of sodium hydroxide are determined by titration. An acid solution reacts with a base solution in a "neutralization" reaction. Titrations permit the concentrations of unknown acids/bases to be determined with a high degree of accuracy. In order to analyze unknown acids/bases‚ we must have
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5 Degrees of Separation. 1. The Daily Routine. Back then‚ its been the normal routine for you to text your ex at any point of the day. To wait for them after school and hangout together before you go home. And now that you’re not together anymore‚ your daily routine kind of falls out of place. Coping with that is not easy. 2. The Little Things. Who could’ve forgot those things you did together so easily? The dates. The holding hands. The going outs on a Sunday morning. The sweet messages.
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The Separation of Powers planned that the Constitution was originally only supposed to do one primary thing‚ “to prevent the majority from ruling with an iron fist.” Based on this and their experience that the framers went away from giving any kind of branch of the new government more power than they needed. Furthermore‚ the separation of powers provides a system of “shared power known as Checks and Balances.” The three branches that are created in the Constitution are Article 1 (Legislative Branch)
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lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form‚ consisting of benzoic acid‚ methyl orange‚ a common acid/base indicator‚ and cellulose‚ a natural polymer of glucose (Huston‚ and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating mixtures of compounds‚ taking advantage of the affinity
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concentrated sulphuric acid at the chemical plant where I work at as the Safety Engineer. In this report‚ I will explain what Sulfuric Acid is‚ the health risks and hazards associated with it‚ the safety precautions that should be taken and how the spill should be handled. Sulfuric Acid‚ H2SO4‚ also commonly known as battery acid or vitriol‚ is one of the top products in the chemical industry‚ with 40 million tons produced annually in the U.S. It is a colourless‚ odourless and oily mineral acid that is soluble
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