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Balancing equations

TermDefinitionPersonal Definition
balanced equation the number of the atoms involved in the reactants side is equal to the number of atoms in the products side the amount of atoms that are involved in the reactant side is equal to the amount of atoms in the products side
ratio of coefficients the molar ratio of each substance in the reaction to every other substance. the ratio of each substance in the reaction to every other substance
limiting reactant the reactant that gets consumed first in a chemical reaction the reactant that gets taken first in a chemical reaction.
excess reactant a reactant present in an amount in excess of that required to combine with all of the limiting reactant. a reactant that is in an amount that is required to combine with the limiting reactant.
law of conservation of mass that in a chemical reaction mass is neither created nor destroyed mass that is not created or destroyed
Describe how you find the number of atoms of an element in the reactants and products of an equation. the reactants must be the same as the number of atoms of each element in the products. If we count the number of hydrogen atoms in the reactants and products, we find two hydrogen atoms.
Describe the process of balancing a chemical equation. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow.
Describe how you find the ratio of coefficients Find the ratio or the moles of each element by dividing the number of moles of each by the smallest number of moles.
Two example problems of finding the number of atoms on the reactant or problem side of the equation To find out the number of atoms: MULTIPLY all the SUBSCRIPTS in the molecule by the COEFFICIENT.
. Two example problems of balancing chemical reactions CO2 + H2O → C6H12O6 + O2 SiCl4 + H2O → H4SiO4 + HCl.
Two example problems of determining the limiting reactant 2A+4B→3C+4D, 3 NaOH(aq) + H3PO4(aq) → Na3PO4(aq) + 3 H2O(l)
example problems of how to find the amount of product when given the amount of reactant using the ratio of coefficients x NH3 + y O2 ---> x NO + z H2O
Created by: user-1523219
 

 



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