Unit · year 1
CU-103 · Stoichiometry & the Mole
Threads structure24 lectures7 results
The quantitative language of chemistry: counting atoms by weighing them.
PREREQUISITES
Lectures
| L01 | Chemical Formulae and Nomenclature — |
| L02 | Relative Atomic and Molecular Mass — |
| L03 | The Mole |
| L04 | Avogadro's Constant and Molar Mass |
| L05 | Converting Between Mass, Moles, and Number |
| L06 | Percentage Composition — |
| L07 | Empirical Formulae from Analysis |
| L08 | Molecular Formulae from Empirical |
| L09 | Combustion Analysis |
| L10 | Writing and Balancing Equations — |
| L11 | Reaction Stoichiometry |
| L12 | The Limiting Reagent |
| L13 | Theoretical, Actual, and Percentage Yield |
| L14 | Solutions and Concentration |
| L15 | Molarity, Molality, and Mole Fraction |
| L16 | Dilution Calculations |
| L17 | Volumetric Analysis and Titration |
| L18 | Gas Volumes and Avogadro's Law |
| L19 | Molar Gas Volume at Standard Conditions |
| L20 | Gas Stoichiometry |
| L21 | Oxidation Numbers — |
| L22 | Balancing Redox Equations — |
| L23 | Precipitation and Net Ionic Equations — |
| L24 | Synthesis: Counting Atoms by Weighing Them |
Results in this unit
T-013
The mole and Avogadro's constant
Linking the mass of a sample to the number of particles.
T-014
Empirical and molecular formulae
From composition by mass to a chemical formula.
T-015
The limiting reagent
Which reactant caps the theoretical yield.
T-016
Gas stoichiometry
Equal volumes of gas contain equal numbers of molecules.
T-017
Concentration and dilution
Molarity and the c1V1 = c2V2 relation.
T-179
Solubility product and the common-ion effect
A saturated solution holds a fixed product of ion activities, so solubility follows from a mass balance and falls when another source supplies one ion.
T-180
The Henderson-Hasselbalch equation
A buffer's pH is its acid's pKa plus the base-ten logarithm of the base-to-acid ratio, exact in equilibrium concentrations and approximate in formal ones.