Chemistry 221 L1 Video Lecture from November 21, 2025. This video covers material from Chapter 7 Part I including the solubility table, exchange (double displacement) reactions, the precipitation reaction, the acid-base reaction, strong and weak acids and bases, the gas forming reaction, 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 Six for Chemistry 221.

A screencast from Chapter 6 in CH 221 entitled “Empirical Formulas”

A screencast from Chapter 6 in CH 221 entitled “Molecular Formulas”

A screencast from Chapter 6 in CH 221 entitled “Molarity”

A screencast from Chapter 6 in CH 221 entitled “Other Concentration Units”

This the Complete Lecture for Chapter 6. There is only one part for Chapter 6.

A screencast from Chapter 7a in CH 221 entitled “Balancing Chemical Equations”

A screencast from Chapter 7a in CH 221 entitled “Aqueous Solutions and Solubility”

A screencast from Chapter 7a in CH 221 entitled “Precipitation Reactions”

A screencast from Chapter 7a in CH 221 entitled “Acid Base Reactions”

A screencast from Chapter 7a in CH 221 entitled “Gas Forming and Combustion Reactions”

A screencast from Chapter 7a in CH 221 entitled “Redox Reactions”

This the Complete Lecture for Chapter 7 Part I. This episode is part 1 of 2 episodes.

This the Complete Lecture for Chapter 7 Part II. This episode is part 2 of 2 episodes.

Chemistry 221 L2 Video Lecture from November 20, 2025, Part 3 of 3. This video covers Chapter 7 Part I (sections 7.1 - 7.2 only) including redox reactions, oxidation and reduction, reducing agent and oxidizing agent, single replacement reactions, oxidation numbers 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 20, 2025, Part 2 of 3. This video covers Chapter 7 Part I (sections 7.1 - 7.2 only) including solubility tables, exchange (double displacement) reactions, precipitation reactions, acid-base reactions, types of acids and bases, gas forming reactions, combustion reactions 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 20, 2025, Part 1 of 3. This video covers Chapter 7 Part I (sections 7.1 - 7.2 only) including the balanced chemical equation, states of matter in equations, stoichiometric coefficients, the law of conservation of mass, balancing equations, ionic chemicals in water, spectator ions, net ionic equations, 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 19, 2025. This video covers material from Chapter 7 Part I including aqueous ionic compounds, net ionic reactions, spectator ions, solubility tables (and how to use one), 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 17, 2025. This video covers material from Chapter 7 Part I including the balanced chemical equation, states of matter in equations, stoichiometric coefficients, the law of conservation of mass, balancing equations, ionic chemicals in water, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!