Stochiometry

- Stoichiometry is used to measure the total amount of substances in a chemical reaction
- it relates to the law of conservation of mass and the law of definite proportions
- used to determine the amount of reactant and product in the chemical reaction
- when using stoichiometry a balanced equation is needed in order to calculate the correct answer
ex 1. With 27.1g of calcium oxide, what is the amount of moles of calcium oxide.
27.1g CaO*(1 mol CaO/56.08g CaO)= 0.484 mol CaO
ex 2. What is the total amount of sodium hydroxide that is needed to make 250 ml of 0.200M solution, in grams.

0.500L NaOH*(0.200mol NaOH/ 1L)*(40.0g NaOH/1mol NaOH)= 4.02g

stoichiometry tutorial
steps to solving stoichiometric problem
mole-to-mole and mass-to-mass conversions