what are the basic requirements for a chemical reaction to occur?
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['Reactant Concentrations. Raising the concentrations of reactants makes the reaction happen at a faster rate. ... ', 'Surface Area. ... ', 'Pressure. ... ', 'Temperature. ... ', 'Presence or Absence of a Catalyst. ... ', 'Nature of the Reactants.']
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['surface area of a solid reactant.', 'concentration or pressure of a reactant.', 'temperature.', 'nature of the reactants.', 'presence/absence of a catalyst.']
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['Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break.', 'Molecules must collide with the proper orientation.']
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All chemical reactions involve both reactants and products. Reactants are substances that start a chemical reaction, and products are substances that are produced in the reaction.
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A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!
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There are four basic characteristics to look at; ignitability, corrosivity, reactivity, and toxicity. Ignitability – According to the EPA, “Ignitable wastes can create fires under certain conditions, are spontaneously combustible, or have a flash point less than 60 °C (140 °F).
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4 Answers. Chemical reaction refers to the process where two or more substances react together to form products. ... Chemical reaction is the process in which one reactant breaks or two or more reactants reacts to form one or more products but chemical equation represents the reaction which had occured by symbols.
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['The equation must represent known facts.', 'The equation must contain the correct formulas for the reactants and products.', 'The law of conservation of mass must be satisfied.']
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['A change of color occurs during the reaction.', 'A gas is produced during the reaction.', 'A solid product called a precipitate is produced in the reaction.', 'A transfer of energy occurs as a result of the reaction.']
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For every chemical reaction, you must account for the energy present in the environment, the bonds of the reactants, the bonds of the products, and the temperature of the products and environment.
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Chemical changes happen when chemical reactions occur. They involve the formation of new chemical elements or compounds . Physical changes do not lead to new chemical substances forming. In a physical change, a substance simply changes physical state , eg from a solid to a liquid.
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A chemical change must occur. One example of a chemical reaction is the rusting of a steel garbage can. That rusting happens because the iron (Fe) in the metal combines with oxygen (O2) in the atmosphere. Chemical bonds are created and destroyed to finally make iron oxide (Fe2O3).
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A chemical reaction is described by a chemical equation, an expression that gives the identities and quantities of the substances involved in a reaction. A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow.
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['Combination reaction.', 'Decomposition reaction.', 'Displacement reaction.', 'Double Displacement reaction.', 'Precipitation Reaction.']
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One of the Following Does Not Happen During a Chemical Reaction. this Is: (A) Breaking of Old Chemical Bonds and Formation of New Chemical Bonds (B) Formation of New Substances with Entirely Different Properties (C) Atoms of One Element Change into Those of Another Element to Form New Products.
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['Speed up chemical reactions.', 'They are required in minute amounts.', 'They are highly specific in their action.', 'They are affected by temperature.', 'They are affected by pH.', 'Some catalyze reversible reactions.', 'Some require coenzymes.', 'They are inhibited by inhibitors.']
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A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.