Chemistry 221 L1 Video Lecture from November 14, 2025. This video covers material from Chapter 6 including molarity, preparing a solution through measurement of a solid and dilution, the dilution equation, mass and volume percentages, parts per million, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
This video offers a few tips and tricks on how to prepare for the Class Presentations in CH 221.
Chemistry 221 L1 Video Lecture from November 12, 2025. This video covers material from Chapter 6 including empirical formula, molecular formula, finding an empirical (and molecular) formula from combustion, concentration, molarity, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L1 Video Lecture from November 10, 2025. This video covers material from Chapter 6 including formula mass and molar mass, how chemists find a molecular formula, percent composition, empirical formulas, using molar mass to convert empirical formulas to molecular formulas, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L1 Video Lecture from November 7, 2025. This video covers Day 3 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
This video shows the Complete Lecture for the Exam II Review in CH 221.
This video offers a few tips and tricks on how to prepare for the second midterm exam in CH 221.
Chemistry 221 L2 Video Lecture from November 6, 2025, Part 3 of 4. This video covers material from Chapter 6 including finding an empirical formula, the difference between an empirical formula and a molecular formula, finding a molecular formula using an empirical formula and the molar mass, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L2 Video Lecture from November 6, 2025, Part 4 of 4. This video covers material from Chapter 6 including solutions, morality, creating a solution from mass of solute, creating a solution using a concentrated solution (C1V1 = C2V2), other concentration types, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L2 Video Lecture from November 6, 2025, Part 2 of 4. This video covers Part II of an Exam Review for the upcoming Midterm Exam II. This lecture also started the material for Chapter 6 including finding a formula in chemistry, methods for finding an empirical formula, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L2 Video Lecture from November 6, 2025, Part 1 of 4. This video covers Part I of an Exam Review for the upcoming Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L1 Video Lecture from November 5, 2025. This video covers Day 2 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L1 Video Lecture from November 3, 2025. This video covers Day 1 of an Exam Review for the Midterm Exam II. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
Chemistry 221 L1 Video Lecture from October 31, 2025. This video covers material from Chapter 5 including building a molecular orbital diagram, bond order, bond order with respect to Lewis structures, magnetism, making ions in MO diagrams, shorthand notation, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!
This is the video introduction to Chapter Guide Five for Chemistry 221.
A screencast from Chapter 5 in CH 221 entitled “Valence Bond and Molecular Orbital Theory”
A screencast from Chapter 5 in CH 221 entitled “Chapter 5 Screencast - Valence Bond Theory (BF3)”
A screencast from Chapter 5 in CH 221 entitled “Chapter 5 Screencast - Valence Bond Theory (CH4)”
A screencast from Chapter 5 in CH 221 entitled “Multiple Bonds in VB Theory”
A screencast from Chapter 5 in CH 221 entitled “An Introduction to Molecular Orbital Theory”