Unit 5 STOICHIOMETRY

Stoichiometry: the branch of chemistry that deals with the calculations of masses of reactants and products involved in a chemical reaction

Mole Ratio: the ratio of moles of one substance compared to moles of another substance, provided by a balanced chemical equation 𝑀𝑜𝑙 𝐵 𝑀𝑜𝑙 𝐴

The “Mole Tunnel”: a process to solve stoichimetric calculations The “Mole Tunnel”: a process to solve stoichimetric calculations. Grams A  Moles A  Moles B  Grams B

Theoretical Yield The quantity of product obtained from the complete conversion of reactants to products in a chemical equation Actual Yield (Experimental Yield) The actual quantity of product obtained in a chemical reaction. Percent Yield A measure of efficiency of a chemical reaction

Systematic Error Errors that have an identifiable cause, that consistently produce results that are too high or too low. Instrumental Error Observational Error Environmental Error Theoretical Error

Instrumental Error When an instrument itself is flawed and provides inaccurate readings

Observational Error When an observer incorrectly reads a measurement

Environmental Error Problems in the surroundings lead to inaccurate results

Theoretical Error When experimental procedures, models, or equations are flawed, resulting in inaccurate results