Content Outline for Physical Sciences Section of the MCAT GENERAL CHEMISTRY ELECTRONIC STRUCTURE AND PERIODIC TABLE A. Electronic Structure 1. Orbital structure of hydrogen atom‚ principal quantum number n‚ number of electrons per orbital 2. Ground state‚ excited states 3. Absorption and emission spectra 4. Quantum numbers l‚ m‚ s‚ and number of electrons per orbital 5. Common names and geometric shapes for orbitals s‚ p‚ d 6. Conventional notation for electronic
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be a sophisticated device that isolates the reaction from its surroundings or it can be a simple device in which the reactants are in constant‚ close physical contact with the surroundings. In either case‚ it is important that temperature and heat transfer can be easily monitored. The reactants contained in a calorimeter are defined as the system. The solvent in which the reactants are dissolved‚ the calorimeter itself including the thermometer‚ and any air that is in contact with the solution are
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affects the rate of reaction. 5. Using the chemical equation‚ write down the following : a) The reactants b) The products c) The state of matter of all the reactants and products d) If the chemical reaction is reversible or irreversible. a) And b) Magnesium + hydrochloric acid → magnesium chloride + hydrogen. Reactants products c) Mg – solid HCL –
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DYNAMIC EQUILIBRIUM forward A +8 reaction ""r=====~’~ reverse reaction Most chemical reactions do not go to completion. Once some products are formed the reverse reaction can take place to reform the reactants. In a closed system the concentrations of all the reactants and products will eventually become constant. Such a system is said to be in a state of dynamic equilibrium. The forward and reverse reactions continue to occur‚ but at equilibrium the rate of the forward reaction
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Chemical equations are the symbolic representations of chemical reactions that are made up of reactants and products. It is made up of the chemical formulas of the reactants and the chemical formula of the products. The reactants are the substances or chemicals that takes part in during a reaction and the products are the chemicals are the substances that result from the chemical reaction. Reactants are on the left side of the chemical equation and the products are on the right side of the chemical
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Experiments 4A-C: Synthesis and Component Analysis of an Iron (III) Oxalate Complex My Name TA‚ Section B## Work Performed on 10/23‚ 10/30‚ & 11/4‚ 200# Report due Tuesday‚ November ##‚ 200# 1. Abstract This experiment initially involved the synthesis of an iron (III) oxalate complex with the general formula Kw[Fex(C2O4)y]·zH2O. The variables x‚ y‚ and z were determined through the duration of the entire experiment. From 1.2000g of Fe(NH4)2(SO4)2 were synthesized 1.1###g of K3[FeIII(C2O4)3]·3H2O
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Tutorial 5 – The Equilibrium Constant (Keq) What is Keq ? The "K" in Keq stands for "Constant". The "eq" means that the reaction is at equilibrium. Very roughly‚ Keq tells you the ratio of Products/Reactants for a given reaction at equilibrium at a certain temperature. [Products] [Reactants] K eq = It’s not quite this simple when we deal with real substances. Let’s take an example. It has been found for the reaction: 2HI(g ) H2(g) + I2(g) that if you take the [H2]‚ the [I2] and the
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Endothermic: A reaction in which energy is absorbed. If your reactants are at a lower energy level than your products then the reaction is endothermic this means it has a + ΔH° Exothermic: A reaction in which energy is released. If your reactants are at a higher energy level than your products then the reaction is exothermic this means it has a ΔH° Standard Enthalpy ( ΔH°) The internal energy stored in the reactants. Only changes in enthalpy can be measured.
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chemical reaction based on the relationship between the concentration of reactants and the rate of reaction. Since spectrophotometers‚ like Spec-20s‚ provide information about concentration‚ these instruments were used to monitor the increase or decrease in concentration of a reactant in a solution over time. By plotting [phph2-] versus time and changing the concentration of OH- used‚ the order of the reaction with respect to each reactant and the overall order of the reaction can be determined. Procedure:
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a cell gains useful energy to fuel cellular changes. The three stages of memory are sensory (immediate)‚ short-term‚ and long-term memory. • What is the role of glycolysis? Include the reactants and the products. Where does it occur? They are used to raise the energy content of the reactants in the first and third steps of glycolysis (glucose-6-phosphate and fructose-1‚6-diphosphate). Chemical reactions proceed more "easily" when they go from a high-energy state to a lower-energy state
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