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Topic: Chemical equation

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	NationMaster - Encyclopedia: Chemical equation
		A chemical equation is a symbolic representation of a chemical reaction.
		The first-ever chemical equation was diagrammed by Jean Beguin in 1615.
		In a chemical reaction system the stoichiometric coefficient of the i-th component is defined as or where Ni is the number of molecules of i and Î¾ is the progress variable or extent of reaction.
	www.nationmaster.com /encyclopedia/Chemical-equation (1820 words)

	chemical equation. The Columbia Encyclopedia, Sixth Edition. 2001-05
		The equation shows that two molecules of hydrogen react with one molecule of oxygen to form two molecules of water.
		As the equation is now written, three oxygen atoms are produced from two, and four hydrogen atoms become only two.
		The equation can now be written CH [right arrow]CO It is not yet balanced, since there are only two oxygen atoms shown as reactants and four as products.
	www.bartleby.com /65/ch/chem-equa.html (712 words)

	The Chemical Equation
		Chemical reactions are really the rearrangement of the connectivity between the atoms in the reagenmts to produce products.
		The Ancients saw that chemical reactions obeyed the law of multiple proportions very precisely and correctly concluded that this was significant.
		Nomatter what is used as a separator, a chemical reaction must be written as an equation, which means that the same number of each type of atom exist each side.
	www.chem.ufl.edu /~itl/2045/lectures/lec_3.html (1152 words)

	chemical equation
		A chemical equation gives two basic pieces of information: (1) the reactants (on the left-hand side) and products (right-hand side); and (2) the reacting proportions (stoichiometry) –; that is, how many units of each reactant and product are involved.
		The equation must balance; that is, the total number of atoms of a particular element on the left-hand side must be the same as the number of atoms of that element on the right-hand side.
		This equation states that one molecule of sodium carbonate combines with two molecules of hydrochloric acid to form two molecules of sodium chloride, one of carbon dioxide, and one of water.
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0006560.html (325 words)

	chemical equation — Infoplease.com
		A symposium in honour of the 20th anniversary of the Peng-Robinson equation of state.
		Development of an equation to relate electrical conductivity to soil and water salinity in a Mediterranean agricultural environment....
		Constitutive equation of peroxide cross-linking of thermoplastic polyolefin rubbers.
	www.infoplease.com /ce6/sci/A0811632.html (236 words)

	Chemical equation Summary
		Chemical equations that illustrate intermediate steps in a reaction may be listed as a continuous equation or may be broken up into intermediate steps with each step represented on a new line where the products of the previous step become the reactants for the next step in the reaction.
		Chemical equations for decomposition reactions reflect the reversal of synthesis reactions (e.g., reactions where complex molecules are broken down into simpler molecules).
		A chemical equation is a symbolic representation of a chemical reaction.
	www.bookrags.com /Chemical_equation (2391 words)

	Chemical equation
		A chemical equation is a mathematical method used to display the ‘before’, the ‘transition’, and ‘after’ stages for chemical reactions, wherein substances are changed into other substances.
		This equation is not balanced because there is an unequal amount of O's on both sides of the equation.
		The equation is now balanced because there is an equal amount of substances on the left and the right hand side of the equation.
	www.ibpassociation.org /encyclopedia/Chemistry/Chemical_equation.php (828 words)

	Chemical Equations
		A chemical equation is the shorthand that scientists use to describe a chemical reaction.
		To write a chemical equation correctly, the number of atoms on the left side of a chemical equation has to be precisely balanced with the atoms on the right side of the equation.
		To balance the chemical equation we must add the coefficient "2" in front of the oxygen molecule on the left side of the equation, showing that two oxygen molecules are consumed for every one methane molecule that burns.
	www.visionlearning.com /library/module_viewer.php?mid=56&l=&c3 (1149 words)

	Chemical Reactions
		Chemical equations can be used to represent what happens on either the atomic or macroscopic scale.
		Chemical equations must be balanced -- they must have the same number of atoms of each element on both sides of the equation.
		Balanced chemical equations can be used to predict the relationship between the amounts of the reactants consumed and the amounts of the products formed in a chemical reaction.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch3/equations.html (1595 words)

	Chemical Equation Balancing: Redox Method
		Traditionally, the "redox method" of chemical equation balancing is explained in terms of charge balancing based on the "oxidation states" of the atoms involved but the method can be applied to equations in which all the compounds are neutral.
		Balancing chemical equations is thought of in terms of the problem of finding intersections of vector subspaces and the "redox method" is explained in terms of variable reduction based on orthogonal compliments of the vector subspaces.
		Chemical compounds can also be represented by tuples and hence it is possible to think of chemical compounds as being orthogonal to each other.
	www-personal.umich.edu /~wsherman/Redox/redox.html (2747 words)

	Columbia Encyclopedia - chemical equation - AOL Research & Learn
		The equation shows that two molecules of hydrogen react with one molecule of oxygen to form two molecules of water.
		Because of the relationship between molecules and the mole, the equation also shows that two moles of hydrogen react with one mole of oxygen to form two moles of water.
		When chemical equilibrium occurs in a reaction, the double arrow is used instead of the single arrow.
	reference.aol.com /columbia/_a/chemical-equation/20051205215509990034 (672 words)

	Calculations and the Chemical Equation
		The equation must be balanced to reflect the law of conservation of mass, which states that matter can neither be gained nor lost in the process of a chemical reaction.
		For a chemical equation to be balanced, the same number of each kind of atom must be present on both sides of the chemical equation.
		Equations Must Be Balanced Because: Atoms Can Be Neither Created Nor Destroyed By Ordinary Chemical Means, so there must be the same number of atoms on both sides of the equation.
	www.chem.latech.edu /~upali/chem120/Chapter5.htm (2057 words)

	Chemical Equations - School for Champions: Succeed in Physical Science (Site not responding. Last check: )
		A chemical equation is similar to a cookbook recipe in that it shows how many units of each substance is required to give the desired result.
		In some highly complex chemical reactions, you may even have a series of equations for chemical reactions that must be done in a particular order.
		Chemical equations are similar to algebraic equations, in that the total number of atoms of each element on the left side must equal the number for that element on the right side.
	www.school-for-champions.com /science/chemequations.htm (1138 words)

	Chemical Equilibrium (Site not responding. Last check: )
		To develop the concept of chemical equilibrium, let us consider a generic reaction in which some arbitrary substances A and B react with each other to form some other substances C and D. We can use small letters a, b, c and d to indicate the coefficients of these substances in the balanced equation.
		Of course, one could criticize this equilibrium constant expression (equation 14) because the pattern we made use of was derived for elementary reactions, and the reaction in equation 10 is not elementary.
		When a chemical equation is reversed, the equilibrium constant for the reversed equation is the reciprocal of the equilibrium constant for the original equation.
	www.accd.edu /pac/chemistr/lectures/Chemical_Equilibrium.htm (5577 words)

	Balancing Equations
		A chemical equation is a symbolic representation of a chemical reaction in terms of chemical formulas.
		This chemical equation would stand for the burning of sodium in chlorine to produce sodium chloride.
		When the coefficients in a chemical equation are balanced, there are equal numbers of atoms of each element on both sides of the equation.
	library.thinkquest.org /10429/high/balequa/balequa.htm (1240 words)

	Education Resources » Chemical equation
		It is a formula used to display different stages for chemical reactions, where chemical substances are changed into other substances.
		The elements and/or compounds to the left of the arrow in a chemical equation represent the reactants, the arrow represents the transition stage, and the species to the right of the arrow represent the products.
		This equation is a balanced equation because there is an equal amount of element’s on the left and right hand sides of the equation.
	www.thecatalyst.org /resource/2006/04/21/Chemical-equation (1210 words)

	Balancing Chemical Equations
		Unlike mathematical equations, the two sides are separated by an arrow, that indicates that the reactants form the products and not the other way round.
		This is the equation for the burning of aluminium in oxygen.
		This was deliberate, as oxygen was present on one side of the equation as an element (i.e.
	richardbowles.tripod.com /chemistry/balance.htm (1979 words)

	Balancing chemical equation, chemical calculator
		Chemical Equation Expert is an integrated tool for chemistry professionals and students.
		So, balancing chemical equations will not be your nightmare but a piece of cake from now on.
		Chemical Equation Expert calculates the mass mole of the compounds of a selected equation.
	www.educationsoft.net /chemical/index.htm (202 words)

	ChemTeam: Balancing Chemical Equations
		The The Law of Conservation of Mass is the rationale for balancing a chemical equation.
		In the example equation, there are two atoms of hydrogen on each side, BUT there are two atoms of oxygen on the left side and only one on the right side.
		An equation is balanced by changing coefficients in a somewhat trial-and-error fashion.
	dbhs.wvusd.k12.ca.us /webdocs/Equations/Balance-Equation.html (692 words)

	Chemical Equation Balancer
		CHEMIX School chemical equation balancer is one of many chemistry tools integrated in chemistry program CHEMIX School.
		The chemical equation balancer in CHEMIX School also allow use of moles (m) as argument.
		Test the chemical equation balancer in CHEMIX School - it can be downloaded by clicking the download link at the top of this page.
	www.standnes.no /chemix/examples/chemical-equation-balancer.htm (254 words)

	Chemical Mailer. Chemistry Mailer For Chemical Equation
		This mathematical mailer allows chemical engineers to include chemical information (chemical equation and other) in their mail.
		Chemical equations, compound formulas, molecular structures and other specific data can be easily included to your chemical mail.
		This is shown mathematically in the Arrhenius equation.
	www.sciletter.com /chemical-mailer.shtml (731 words)

	Chemical Equation Expert
		Chemical Equation Expert is an integrated tool for chemistry professionals and students.
		So, balancing chemical equations will not be your nightmare but a piece of cake from now on.
		Chemical Equation Expert calculates the mass mole of the compounds of a selected equation.
	www.pc-calculators.com /chemical-equation-expert.htm (171 words)

	General Chemistry Online: Glossary: Chemical change
		A chemical change is a dissociation, recombination, or rearrangement of atoms.
		An ionic equation is a balanced chemical equation in which strong electrolytes are written as dissociated ions.
		A molecular equation is a balanced chemical equation in which ionic compounds are written as neutral formulas rather than as ions.
	antoine.frostburg.edu /chem/senese/101/reactions/glossary.shtml (1532 words)

	Chemical Bonding
		A chemical reaction is a process in which the physical and chemical properties of the original substances change as new substances with different physical and chemical properties are formed.
		To balance a chemical equation we use numbers called coefficients, which are placed in front of a chemical formula.
		A chemical equation is balanced when there are the same numbers of atoms of each element on both sides of the equation.
	www.msu.edu /~napoli13/Units/chemicalreactions.htm (751 words)

	CHEMystery: Chemical Reactions: Chemical Equations (Site not responding. Last check: )
		A chemical equation is a description of a chemical reaction.
		The equation now states, for every two moles of hydrogen gas, two moles of water can be formed, and for every one mole of oxygen gas, two moles of water can be formed.
		In balanced equations the mole ratio of products to reactants always allows you to calculate every substance in the equation if you know that every other substance in the reaction is completely consumed.
	library.thinkquest.org /3659/chmreact/equation.html (313 words)

	Grandinetti-Teaching-Chem 121-Course Notes-Chemcal Reactions
		A balanced equation is essential to known the stoichiometry for the chemical reaction.
		gases according to the stoichiometric ratio of 2:1 from the chemical equation.
		To determine which reagent is limiting we use the mole ratio from the chemical equation to convert moles NH to moles CuO.
	www.grandinetti.org /Teaching/Chem121/Lectures/ChemicalReactions (1065 words)

	Types of Equations
		Balancing is done by placing coefficients in front of the formulas to insure the same number of atoms of each element on both sides of the arrow.
		Examine the formulas carefully and decide which of the four types of equations applies to the reaction you are considering.
		Equations of this type are called net ionic equations.
	www.chem.vt.edu /RVGS/ACT/notes/Types_of_Equations.html (871 words)

	Basic Information In A Chemical Equation (Site not responding. Last check: )
		A chemical equation is nothing more than a way of writing and describing a chemical change.
		You know that a chemical symbol is shorthand for an element and that a chemical formula is shorthand for a compound.
		Equations are a shorthand way of representing a chemical reaction.
	www.highschoolchem.com /tut-eqbasics.html (302 words)

	Zero Net Mass Flow of Superfluid Helium (He II, Superfluidity)
		There is no net driving force for the bulk liquid as a whole and the chemical potential across the capillary (or porous plug) is zero.
		The preceding equation is the Hagen-Poiseuille law for the laminar transport of normal fluid in a capillary.
		Equation 14 is a dimensionless form of Equation 11.
	www.yutopian.com /Yuan/ZNMF.html (704 words)

	Lecture Notes: Chemical Equations
		For an equation to be considered ‘balanced’ it has to have the same amount of each element on the left and on the right
		One special type of chemical equation is called a total ionic equation in which all the ions are shown separately since they are really separate when they are in solution
		Chemical equations tell you the molar ratios among all the substances involved
	home.gwi.net /~dakeller/Chem/Lecture.Chemical_Equations.html (940 words)

	How can I balance an equation?
		Now, when we write chemical equations, we need to have the formulas for the reagents on the left side (the stuff that's going to do the chemical reaction) and the formulas for the products (the stuff you make) on the right.
		If we were to simply put the formulas of the chemicals on the left and right without saying how much of it was going to react, then we would run the risk of saying that the mass of what we end up with is different than the mass of what we started with.
		On the right side of the equation, there are two atoms of sodium, one atom of sulfur, five atoms of oxygen (four from the sodium sulfate and one from the water), and two atoms of hydrogen.
	misterguch.brinkster.net /eqnbalance.html (1392 words)

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