MhChem Chemistry with Dr. Michael Russell

A screencast from Chapter 2 in CH 221 entitled “Chemical Formulas, the 7 Diatomics, Allotropes”

A screencast from Chapter 2 in CH 221 entitled “Empirical Formulas and Isomers”

Chemistry 221 L1 Video Lecture from October 3, 2025. This video covers material from Chapter 2 and Chapter 3 including the molar mass of compounds, light and electromagnetic radiation, frequency, wavelength, the speed of light, Planck's constant, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 4 of 4. This video covers material from Chapter 3 including the Bohr model for the atom, sharp line spectra, absorbance and emission, calculating the wavelength and frequency from a change in energy, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 3 of 4. This video covers material from Chapter 3 including a discussion of light, electromagnetic radiation, frequency and wavelength, the speed of light and Planck's constant and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 2 of 4. This video covers material from Chapter 2 including a discussion of the mole and Avogadro's number, the importance of the atomic mass number with relationship to molar mass, calculating the molar mass of a compound, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 1 of 4. This video covers material from Chapter 2 including an overview of the atom, protons, neutrons, electrons, the atomic number, the mass number, isotopes, atomic mass, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 1, 2025. This video covers material from Chapter 2 including the importance of atomic mass, how atomic mass is calculated, the 7 diatomics, molecular formulas and empirical formulas, the mole, Avogadro's number, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 29, 2025. This video covers material from Chapter 2 including the composition of the atom (protons, neutrons and electrons), the atomic number, the Rutherford Gold Foil experiment, atomic mass, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 26, 2025. This video covers material from Chapter 1 (and a small bit from Chapter 2) including measurements in chemistry, precision and accuracy significant figures, rounding of numbers, mass percentages, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 3 of 3. This video covers material from Chapter 1 including measurements in chemistry, precision and accuracy significant figures, rounding of numbers, mass percentages, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 2 of 3. This video covers material from Chapter 1 including more on elements and the periodic table, SI units, temperature scales, density, dimensional analysis, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 1 of 3. This video covers material from Chapter 1 including a discussion of "what is chemistry", types of chemistry, the importance of chemistry, atoms, molecules and mixtures, the periodic table, important groups on the periodic table, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 24, 2025. This video covers material from Chapter 1 including a discussion of measurements and SI units, length, mass, volume, density, temperature scales, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 22, 2025. This video covers material from Chapter 1 including a discussion of "what is chemistry", types of chemistry, the importance of chemistry, atoms, molecules and mixtures, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Welcome! This is a video to help students get started in Dr. Russell's chemistry classes at Mt. Hood Community College in Gresham, Oregon, USA. Website: http://mhchem.org Let me know if you have any questions! Peace!

This video will help you find our three main chemistry classrooms (namely AC 1303, AC 2501 and AC 2507) as well as my office (AC 2568) at Mt. Hood Community College in Gresham, Oregon, USA. To get to all of these locations, go to the "F" or "G" parking lots (or as close to them as possible), both of which are located near the main MHCC entrance on NE 29th street and NE Kane Dr. in Gresham ). AC 1303 is on the lower level of the campus, adjacent to the Planetarium. AC 2501, AC 2507 and my office (AC 2568) are located on the upper level of campus, and all are very close to the "F" and "G" parking lots. Let me know if you have any questions! Peace!

Welcome to Chemistry 221 with Dr. Michael Russell!

A screencast from Chapter 1 in CH 221 entitled "Significant Figures (Sig figs)"

A screencast from Chapter 1 in CH 221 entitled "Precision and Accuracy"

A screencast from Chapter 1 in CH 221 entitled "Density"

A screencast from Chapter 1 in CH 221 entitled "Temperature and Volume"

A screencast from Chapter 1 in CH 221 entitled "Measurements, Metrics, Length, Mass, Time"

Chemistry 223 Video Lecture from June 6, 2025. This video covers Day 2 of an Exam Review for the upcoming Final Lecture Exam. This is the final lecture video for CH 223 Spring 2025! CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from June 4, 2025. This video covers Day 1 of an Exam Review for the upcoming Final Lecture Exam. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from June 2, 2025. This video covers material from Chapter 19 including an introduction to complex ion and coordination compound nomenclature, geometrical isomerism in inorganic compounds, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 30, 2025. This video covers material from Chapter 19 including an overview of transition metals, Lewis acids and bases, ligands, coordination number, the dentate system for ligands, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 28, 2025. This video covers Day 3 of an Exam Review for the upcoming Midterm Exam II. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 23, 2025. This video covers Day 2 of an Exam Review for the upcoming Midterm Exam II. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 21, 2025. This video covers material from Chapter 17 including info on electrolysis and more; it also covers Day 1 of an Exam Review for the upcoming Midterm Exam II. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 19, 2025. This video covers material from Chapter 17 including using the Faraday constant F, deltaG and E, E and K, quantitative electrochemistry, the Nernst equation, types of batteries and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 16, 2025. This video covers material from Chapter 17 including using SHE electrodes, cell potential tables of reduction, calculating E values, E and delG (spontaneity), the Faraday constant F, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 14, 2025. This video covers material from Chapter 17 including balancing redox reactions in base, direct redox reactions, making an electrochemical cell, electrocell short hand notation, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 12, 2025. This video covers material from Chapter 17 including redox versus atom transfer reactions, direct and indirect redox reactions, balancing redox reactions (part 1), and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 9, 2025. This video covers material from Chapter 16 including the meaning of deltaG, enthalpy and entropy driven reactions, threshold temperatures and delG, equilibrium constants and delG, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 7, 2025. This video covers material from Chapter 16 including entropy and enthalpy, the second law of thermodynamics, Gibbs Free energy, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 5, 2025. This video covers material from Chapter 16 including kinetics versus enthalpy, the 1st and 3rd laws of thermodynamics, an introduction to entropy, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from May 2, 2025. This video covers material from Chapter 15 including separating ions through differences in Ksp, formation constants and Kf values, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 30, 2025. This video covers material from Chapter 15 including solubility, the solubility table from CH 221, Ksp, calculating ion concentrations to begin precipitation and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 28, 2025. This video covers material from day 3 of an Exam Review for Midterm Exam I of CH 223. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 25, 2025. This video covers material from day 2 of an Exam Review for Midterm Exam I of CH 223. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 23, 2025. This video covers material from day 1 of an Exam Review for Midterm Exam I of CH 223. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 21, 2025. This video covers material from Chapter 14 Part 2 including WA+SB titrations, WB+SA titrations, the effect of Ka on titration curves, polyprotic acids, indicators, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 18, 2025. This video covers material from Chapter 14 Part 2 including making a buffer, SA+SB titrations, SB+SA titrations, an intro to WA+SB titrations, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 16, 2025. This video covers material from Chapter 14 Part 2 including buffers, the Henderson-Hasselbalch equation, adding strong acids and strong bases to a buffer (the modified HH equation to avoid 'double ICE') and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 14, 2025. This video covers material from Chapter 14 Part 1 and Chapter 14 Part 2 including complex ions, formation constants, titrations, the Common Ion Effect (and Le Chatelier's Principle), and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 11, 2025. This video covers material from Chapter 14 Part 1 including the directionality of acid-base reactions, quick pH equations for weak acids and bases (as well as strong acids and bases), the pH effects of salts, Lewis acid and bases, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 9, 2025. This video covers material from Chapter 14 Part 1 including Kw, pH and pOH, Ka and Kb, pKa and pKb, the table of acids and bases, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 7, 2025. This video covers material from Chapter 13 and Chapter 14 Part 1 including Le Chatelier's Principle and Q, strong and weak acids and bases, Kw, conjugate acids and bases, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 4, 2025. This video covers material from Chapter 13 including equilibrium calculations, Le Chatelier's Principle, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!

Chemistry 223 Video Lecture from April 2, 2025. This video covers material from Chapter 13 including converting Kp to Kc, the reaction quotient Q, equilibrium concentration calculations, and more. CH 223 website: http://mhchem.org/223 Let me know if you have any questions! Peace!