HONORS CHEMISTRYUnit D: Stoichiometry

CHAPTER NINE: STOICHIOMETRY

STOICHIOMETRYuSTOICHIOMETRY is the area of chemistry

that involves mass relationships between reactants and products

uBased on balanced chemical equations and the Law of Conservation of Mass

uThe MOLE CONCEPT is the backbone of STOICHIOMETRY

uYou have used the concept in COOKING!

STOICHIOMETRY PROBLEMSuStoichiometry problems can be

simple or a little challenginguRanging from a single step to

three or more stepsuProblem type can be identified

by the GIVEN information and the UNKNOWN or QUESTION ASKED

MOLE RATIOuMOLE RATIOS are derived from

Balanced EquationsuMOLE RATIOS are CONVERSION

FACTORSuMOLE RATIOS are the

backbone of stoichiometric calculations

uMOLE RATIOS covert from substance “A” to substance “B”

STOICH: LEVEL 1 (easy)uMole to Mole ProblemuSingle Step

CalculationuMole Ratio converts

“A” to “B”u“Given” a mole

amount and “Unknown” a mole amount

STOICH: LEVEL 2 (not bad)uMass to Mole Problem OR Mole to Mass ProblemuTwo Step CalculationuMole Ratio converts “A” to “B”uMolar Mass converts mass/moleu“Given” a mole amount and “Unknown” a mass

amount OR “Given” a mass amount and “Unknown” a mole amount

STOICH: LEVEL 3 (Nice!)uMass to Mass ProblemuThree Step CalculationuMole Ratio converts “A” to “B”uMolar Mass converts mass/mole… Two Times!u“Given” a mass amount and “Unknown” a mass

amount