ACID/BASE You might need to know the following K values: CH3COOH Ka = 1.8 x 10–5 Benzoic Acid Ka = 6.5 x 10–5 HNO2 Ka = 4.5 x 10–4 NH3 Kb = 1.8 x 10–5 HF Ka = 7.2 x 10–4 H2S Ka = 5.7 x 10–8 HSO4– Ka = 1.2 x 10–2 HS– Ka = 1.2 x 10–13 HCOOH Ka = 1.8 x 10–4 HOCl Ka = 3.0 x 10–8 SIMPLE ACIDS AND BASES 1. According to the Brønsted–Lowry definition‚ which species can function both as an acid and as a base? (A) Cl– (B) SO42– (C) NH4+ (D) HCO3– (E) H3O+ 2. Which of the following
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Title:Extraction:Extraction with acid and alkaline Objective: 1. To recover benzoic acid and p-dichlorobenzene from its mixture using acid-alkaline extraction. 2. To determine the percentage recovery and melting point of benzoic acid and p-diclorobenzene. Apparatus:Separatory funnel(250mL)‚Buchner funnel‚beaker. Materials:Benzoic acid‚p-dichlorobenzene‚ether‚10% NaOH‚conc.HCl‚distilled water‚ anhydrous CaCl2. Introduction: Organic compounds in an aqueous mixture can be separated
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NUCLEIC ACIDS I.BASIC CONCEPTS II.CLASSES III.CHEMICAL NATURE IV.FUNCTION I.BASIC CONCEPTS NUCLEIC ACIDS polymeric macromolecules‚ or large biological molecules‚ essential for all known forms of life are made from monomers known as nucleotides Each nucleotide has three components: a 5-carbon sugar‚ a phosphate group‚ and a nitrogenous base If the sugar is deoxyribose‚ the polymer is DNA. If the sugar is ribose‚ the polymer is RNA. Together with proteins‚ nucleic acids are the most
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though probably one of the most recognizable. In the ‘50s television was gaining popularity and sitting down to watch T.V. was a family bonding experience. Celebrities were put on a very high pedestal‚ even more so than today’s celebrities. People like James Dean‚ Marilyn Monroe‚ and John Wayne were treated like royalty. In the 1950s musicians‚ movie stars‚ and T.V. stars were some of the most important people in America. Musicians in the ‘50s were pretty bland‚ minus Elvis‚ they were all just stand
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Separation of a Carboxylic Acid from a Neutral Compound by Extraction Reference: Smith‚ Chapter 2 (Acids and Bases) Introduction Carboxylic acids and phenols are two families of organic compounds that contain carbon‚ hydrogen and oxygen‚ and also react with water to yield an excess of hydronium ions over hydroxide ions. Pure water has a pH of 7‚ which means it has a hydronium ion concentration‚ [H3O+] of 10-7 M (M = molarity‚ moles/Liter). The hydronium ions in pure water come from the self-ionization
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In 50 years our world will probably be a very different place to live. In Fifty Years Fifty years from now ‚ there is no doubt that the world has changed in ways many people would not even try to imagine . Humans have a very curious nature and they have the urge to discover constantly things and ways to improve their way of life . Change is also something that most people welcome because they do not want to be caught up in life doing the same thing repeatedly In terms of environmental change
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To what effects are the causes‚ characteristics and effects of urbanisation different in countries at different stages of economic development? Urbanization is the increasing number of people that migrate from rural to urban areas. It predominantly results in the physical growth of urban areas‚ be it horizontal or vertical. An example of urbanisation for an LEDC is Rio de Janeiro and Mumbai which has a population of 18.3 million put together and is still expanding; an example of an MEDC is Manchester
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Songs of the 1950s Songs of the 50s In this paper I will research and identify 5 songs of the 1950s and what the songs reflect about the culture‚ mood‚ and values of the 1950s and the ethnic groups the artists came from. I will also discuss how accurately the songs reflect the mood‚ value‚ and perceptions of the 1950s as discussed in our readings‚ Nation of Nations. “All I Have To Do Is Dream” The first song I would like to address would be: “All I
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Chapter 10 Margin Questions In what respects did Byzantium continue the patterns of the classical Roman Empire? In what ways did it diverge from those patterns? Continuance can be seen in Byzantium’s roads‚ military structures‚ centralized administration‚ imperial court‚ laws‚ and Christian organization. It can also be seen in Byzantium’s pursuit of the long-term Roman struggle with the Persian Empire. Byzantium diverged through the development of a reformed administrative system that gave appointed
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Exchange: two or more parties with a desire and ability to exchange and a way to communicate. Marketing Mix: Product Symbolism: what a product or brand means to consumers and what they experience when is using it. Brand equity: intangible value‚ image or goodwill towards a brand INdirect Channels: distribution through a network of whosalers or retailers Direct channels: bring to consumers direcly through distribution means like the internet Promotional Mix: advertising‚ direct
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