Stoichiometry

9.1

Stoichiometry

• Composition stoichiometry – deals with the ______ relationships in _______________.• Reaction stoichiometry – involves

the mass _____________ between _________ and _________ in a _________ reaction.

Types already covered – Don’t Copy• Mass – Moles and vice versa• Mole – digits and vice versa • Still need to be covered/pertaining to

reactions• Mole – mole and vice versa• Mass – mole and vice versa• Mass – mass and vice versa• Mass – digits and vice versa• Mass – volume and vice versa

Previous types of problems

• How many atoms are present in 2.5 mol of zinc?• Determine the mass in grams of 3.50

mol of copper.• How many atoms are present in 100

grams of silver?

A Problem

• If you have 2.4 moles of NH3, how many moles of oxygen are needed to consume all NH3?

• Need a balanced reaction

• You must use units

Mass-Mass Stoichiometry

• If you have 450g of isoamyl alcohol (C5H11OH), how many grams of C2H3O2C5H11 do you have?• grams of A moles of A

moles of B grams of B

Mass-Mass

• If you solve in a stepwise manner, don’t round until the end.• How much (g) water needs to be

added to react with 8.1 g of Mg?• What mass of tin(II) fluoride can be

made from 55.0 g of HF if there is enough tin present?

Mole-Mass

• How much (grams) glucose is used with 1.03 x 10-2 mol oxygen?• What is the mass of CO2 produced

from the above problem?• Mass of H2O?

Density and Stoichiometry

• What volume of water is produced from 20.0 mol of CO2 if an excess of LiOH is present? (Density of water is 1.00 g/mL)• D = mass/volume• What is the mass of LiOH used to

obtain 1.5 L of water?