Stoichiometry

By:Jose penate

What is it?

The word Stoichiometry comes from 2 greek words: stoicheion (meaning "element") and metron (meaning "measure").Stoichiometry deals with calculations about the masses of reactants and products involved in a chemical reaction.

How do you solve?

Almost all Stoichiometry problem can be solved in almost 4 simple steps

1.Balance the equation.

2.Convert units of a given substance to moles.

3.Using the mole ratio,calculate the moles of substance yielded by the reaction.

4.Convert the moles of wanted substances to desired units.

What is it used for?

Stoichiometry allows us to make predictions about the outcomes of a chemical reaction. Making useful predictions is one of the main goals of science,the other being the ability to explain phenomena we observe in the natural world.

Things it predicts:

1.Predict the mass of a product of a chemical reaction if given the starting masses of reactants.

2.predicts the volume of the gas which will be produced by a reaction if given the starting amounts of reactions?

3.Determine the optimal ratio of reactants for a chemical reaction so that all reactants are fully used

How is it used in the real world?

Many day to day things like air bags,rocket fuel,and it even occurs when camels keep water in their humps.

How to know when to use it?

If you ever get a chemical equation and the question is asking for a specific amount of a reactant or if they ask for the mass of a reactant then you know to use it.There are many other tell as well like if they ask for mass of products,chemical equation balancing,molar weights,or formulas of various compounds.

Why is it important?

In chemistry it is very important to understand the relationship between reactants and products in a reaction. Stoichiometry is exactly that. It is the quantitative relation between the number of moles (and therefore mass) of various products and reactants in a chemical reactions.

Lets try it!

Chemical reaction: 2 CaO + 3 Co2 = 2 CaCo3 + O2

The equation is already balanced so the next thing you would have to do is to convert the given substance into moles.The molar mass of CaO+CO2 is 100.086mol.The next thing you would have to find the mole ratio of your specific ration and calculate the substances yielded by the reaction.When you get that amount of moles you want then you convert it into the desired units.