Stoichiometry Essay

Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change. Jeremias Benjamin Richter defined stoichiometry in 1792 as the science of measuring quantities or mass ratios of chemical elements. You might be given a chemical equation and the mass of one reactant or product and asked to determine the quantity of another reactant or product in the equation. Or, you might be given the quantities of reactants and products and asked to write the balanced equation that fits the math. It is typically introduced after discussing parts of the atom and unit conversions. While it's not difficult, many students get put off by the complicated-sounding word. For this

Most often the question is a word problem so assume that 10 grams of Al reacts completely with Ba. How many grams of Cl would be produced. Balance the chemical equation, by malign sure you have the same number of atoms on both sides of the reactant and product side of the equation. To simplify you would just use the law of conservation of mass. Theme converts any mass value in the mass problem into moles(use the molar mass to do this). Use molar proportion to determine unknown quantities of moles. Do this by setting two molar ratios equal to each other, with the unknown as the only value to solve.Convert the mole value you just found into mass, using the molar mass of that substance. Because atoms, molecules, and ions react with each other according to molar ratios, you'll also encounter stoichiometry problems that ask you to identify the limiting reactant or any reactant that is present in excess. Once you know how many moles of each reactant you have, you compare this ratio to the ratio required to complete the reaction. The limiting reactant would be used up before the other reactant, while the excess reactant would be the one leftover after the reaction

Once you know how many moles of each reactant you have, you compare this ratio to the ratio required to complete the reaction. The limiting reactant would be used up before the other reactant, while the excess reactant would be the one leftover after the reaction proceeded.

Since the limiting reactant defines exactly how much of each reactant actually participates in a reaction, stoichiometry is used to determine theoretical yield. This is how much product can be formed if the reaction uses all of the limiting reactant and proceeds to completion. The value is determined using the molar ratio between the amount of limiting reactant and product. The other reactant is considered to be in excess.

Since the limiting reactant defines exactly how much of each reactant actually participates in a reaction, stoichiometry is used to determine theoretical yield. This is how much product can be formed if the reaction uses all of the limiting reactants and proceeds to completion. The value is determined using the molar ratio between the amount of limiting reactant and product. The other reactant is considered to be in