A screencast from Chapter 4 in CH 221 that introduces redox reactions as well as oxidation and reduction. https://mhchem.org/221/classroom/zAudio/Ch05RedoxIntro.mp4

A screencast from Chapter 4 in CH 221 which offers tips on recognizing redox reactions. https://mhchem.org/221/classroom/zAudio/Ch05RedoxRecognize.mp4

A screencast from Chapter 4 in CH 221 which looks at oxidation numbers and their use in redox reactions. https://mhchem.org/221/classroom/zAudio/Ch05RedoxOxNums.mp4

A screencast from Chapter 3 in CH 221 that introduces molarity and solution concentration. https://mhchem.org/221/classroom/zAudio/Ch05Molarity.mp4

A screencast from Chapter 3 in CH 221 which examines how solutions can be prepared from dilution methods. https://mhchem.org/221/classroom/zAudio/Ch05SolnDiln.mp4

A screencast from Chapter 4 in CH 221 that examines titrations and their usefulness. https://mhchem.org/221/classroom/zAudio/Ch05Titrations.mp4

A screencast from Chapter 4 in CH 221 which examines the pH scale and solution stoichiometry. https://mhchem.org/221/classroom/zAudio/Ch05pHSolnStoich.mp4

A screencast from Chapter 5 in CH 221 which introduces energy from a chemistry perspective. https://mhchem.org/221/classroom/zAudio/Ch06IntroEnergy.mp4

A screencast from Chapter 5 in CH 221 that introduces Thermodynamics, the science of energy transfer. https://mhchem.org/221/classroom/zAudio/Ch06Thermodynamics.mp4

A screencast from Chapter 5 in CH 221 which looks at energy changes with no change of state - the q = mC(del)T equation https://mhchem.org/221/classroom/zAudio/Ch06qmCDelT.mp4