Introduction: In this lab‚ we measured the acid-base strengths of seven separate organic compounds. The lab was painless to perform‚ it consisted of adding a small amount of one of the organic compounds to a well‚ and testing the pH via testing paper. The color of the paper was then analyzed to determine what the pH of the compound was. The structures were benzenesulfonic acid‚ benzoic acid‚ benzyl alcohol‚ benzylamine‚ p-cresol‚ and p-toluidine. My initial hypothesis about the acidity/basicity
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Chapter 2 Introduction to Organic Nomenclature and Functional Groups Chapter Outline 2.1 Drawing Organic Structures Drawing two-dimensional‚ condensed‚ and bond-line structures of organic compounds 2.2 Alkanes An introduction to alkanes 2.3 Structural Isomerism A look at compounds with the same molecular formula but with different structures 2.4 IUPAC Nomenclature An introduction to the IUPAC rules of nomenclature 2.5 Naming Alkanes An introduction to the systematic
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crystallization of a particular compound? What is the primary consideration in choosing a solvent for crystallizing a compound? volatile in order to be easily removed from the purified crystals. In selecting a solvent consider that like likes like. Polar compounds dissolve polar compounds and non-polar compounds dissolve non-polar compounds. Solvent will dissolve a large amount of the impure compound at temperatures near the boiling point of the solvent the compound would be completely insoluble in
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positive or negative charge Anion- negatively charged ion Cation- positively charged ion Molecules- small‚ electrically neutral “units”; maintain the properties of that substance Formula unit- the lowest whole number ratio of ions in an ionic compound Products are on the right side of the yield sign Reactants are on the left side of the yield sign Coefficients are the whole numbers that we place in front of a substance to balance an equation. We correctly write the Nobel gases (such
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a special chemical compound—called CHEMIX—that is used extensively in high school chemistry classes. This compound must contain at least 20% sulfur‚ at least 30% iron oxide‚ and at least 30% but no more than 45% potassium. Tarmac’s marketing department has estimated that it will need at least 600 pounds of this compound to meet the expected demand during the coming school session. Tarmac can buy three compounds to mix together to produce CHEMIX. The makeup of these compounds is shown in the following
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question. 1. Which type of compound usually has higher melting points‚ ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) 2. Do ionic compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous solutions (when the ionic compounds are dissolved in water)? 3. Do covalent compounds conduct electricity as: (3 points) a. Solids? b. Liquids? c. Aqueous solutions (when the covalent compounds are dissolved in water)
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decomposition of gold oxide * 2. Light decomposition (photolysis) of silver bromide * 3. Electrolytic decomposition of molten lead (II) bromide * Synthesis reaction is the formation of a compound from its elements or a more complex compound from simpler compounds. * Application of decomposition reaction in the real world: * Rust is an oxide of iron that forms when iron structures are exposed to oxygen in the air. * The ammonia industry synthesises
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00945 mole) Mass sodium borohydride = 0.4059g (0.0107 mole) Mass compound A used to form compound B = 1.0647g Results Mass (g) moles Molecular formula Yield (%) Mp (pure) Compound A 1.7458 0.00815 C14H14O2 86.22 138-139 Compound C 0.4255 0.001988 C14H14O2 40.02 136-138 Spectral Analysis IR Absorption (cm-1) Assignment Benzoin 3411‚ 3374 OH 2961‚ 2903 C-H aromatic 2358 C-O 1678 Ketone Compound A 3372 OH stretch 3310 OH stretch 3085‚ 3060‚ 3030 C-H
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Periodic Table: * Mass Number = protons + neutrons in the nucleus * Atomic Number = number of protons in the nucleus * Number of neutrons = mass number – atomic number Example: Lithium (Li) * # of protons + # of neutrons = mass # * 3 + 4 = 6.9/ 7 * The atomic mass is the mean of all the isotopes of Lithium in nature; round the number * Isotopes of a specific element have a varying number of neutrons * The number
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Melting point 1. What two effects do impurities have on the melting point of an organic compound? Soluble impurities affect the melting point of a solid in the following manner. a. The presence of an impurity in the molten compound reduces its vapor pressure thus lowering the melting point of the compound. b. Broaden the melting point range. 2. For what tow purpose are melting points routinely used a. To determine the identity of an organic solid. b. To determine the purity of an organic solid
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