Everything You Need to Ace High School Chemistry

Chad makes High School Chemistry understandable, memorable, and enjoyable! 20 years of experience has gone into making this course as effective and efficient as possible.

  • Video Lectures Covering 16 Chapters of High School Chemistry

  • Quizzes and Chapter Tests

  • Over 500 Video Solutions

  • Study Guides for each Chapter

  • In-Lesson Discussions

What Students are Saying

Emerald Salazar

5 star rating

“Okay so obviously this isn't the best case scenario but I crammed a semesters worth of chemistry in 2 weeks and my final grade was raised a letter grade higher! Chad is really great at explaining things! I will be continuing to use his courses for...”

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“Okay so obviously this isn't the best case scenario but I crammed a semesters worth of chemistry in 2 weeks and my final grade was raised a letter grade higher! Chad is really great at explaining things! I will be continuing to use his courses for help with the rest of my chemistry classes!”

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Christine Sulzer

5 star rating

“Chad's videos have helped me grasp some challenging chemistry topics in words that I can understand and with relatable analogies. I'm so thankful that a fellow classmate told me about Chad. ”

“Chad's videos have helped me grasp some challenging chemistry topics in words that I can understand and with relatable analogies. I'm so thankful that a fellow classmate told me about Chad. ”

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shannon yap

5 star rating

“For me, these chemistry videos gave me the confidence and joy in learning chemistry for the first time. Chemistry was always that subject that I just kind of dodged. Somehow I was never able to understand the chemistry taught to me in high school...”

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“For me, these chemistry videos gave me the confidence and joy in learning chemistry for the first time. Chemistry was always that subject that I just kind of dodged. Somehow I was never able to understand the chemistry taught to me in high school and college four years ago. I got so frustrated with just memorizing things and not understand a single thing about what was actually going on. Learning from Chad has got to be one of the best decisions I have made, as he has turned this subject into something I am looking forward to learning about and teaching me foundations that have been long overdue. I am not one with the videos yet, but I have to say they are truly wonderful. -Shannon ”

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Nadine Hana

5 star rating

“He is very clear, concise, and makes sure to list any possible tricks or exceptions we can run into on an exam. Definitely would recommend!!!! ”

“He is very clear, concise, and makes sure to list any possible tricks or exceptions we can run into on an exam. Definitely would recommend!!!! ”

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Kissa Batul

5 star rating

“This was the best review ever! It was simple to follow and the questions at the end of the chapters are very helpful. Also loved the solution videos! ”

“This was the best review ever! It was simple to follow and the questions at the end of the chapters are very helpful. Also loved the solution videos! ”

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Amy Chen

5 star rating

“This general chemistry review was the first purchase I had ever made to prepare/review for a course, and I NEVER leave reviews on anything, but I just have to say that this is the best course prep out there! I watch Chad's videos because not only ...”

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“This general chemistry review was the first purchase I had ever made to prepare/review for a course, and I NEVER leave reviews on anything, but I just have to say that this is the best course prep out there! I watch Chad's videos because not only are his analogies hilarious and effective, he gives off the most positive energy and I feel inspired to learn chemistry because of him. Thank you for being such a phenomenal instructor, Chad! ”

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Raafia Mulla

5 star rating

“I think i learned more from Chad than i did from my orgo and physics professors combined. Chad, you are a boss! ”

“I think i learned more from Chad than i did from my orgo and physics professors combined. Chad, you are a boss! ”

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Jemi Patel

5 star rating

“The simple straightforward outlines really help focus on whats most important. Also, the quizzes are very helpful when determining what you do or don't yet understand.”

“The simple straightforward outlines really help focus on whats most important. Also, the quizzes are very helpful when determining what you do or don't yet understand.”

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HaetNim Kim

5 star rating

“Very clear and thorough outline lectures. Even though these lectures are online, Chad's lectures are super organized and because of his excellent teaching style, lectures are easy to follow and understand. I just wish discussion forum and/or conta...”

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“Very clear and thorough outline lectures. Even though these lectures are online, Chad's lectures are super organized and because of his excellent teaching style, lectures are easy to follow and understand. I just wish discussion forum and/or contact e-mail are more active so questions that I have can be answered quickly. ”

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Megan Phipps

5 star rating

“These lectures help me understand my textbook and professor better. Chad covers every type of problem you could encounter on an exam and makes sure to use the same wording that a professor or textbook would use. This last point about wording is ex...”

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“These lectures help me understand my textbook and professor better. Chad covers every type of problem you could encounter on an exam and makes sure to use the same wording that a professor or textbook would use. This last point about wording is extremely important because certain phrases indicate how you should approach a problem. If you don't know what certain phases mean, then it becomes increasingly difficult to know which equation to use and what exactly you are solving for. So my favorite thing about these lectures is how they address this issue. Additionally, Chad provides a lot of shortcut equations that are really helpful and necessary to know if you want to finish your exam on time. ”

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Klara Sulce

5 star rating

“What a wonderful collection of General Chemistry content made easy.”

“What a wonderful collection of General Chemistry content made easy.”

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MEGI PASHO

5 star rating

“So I cant find the words to describe how helpful this course has been. I mean for every science class that I've taken I have seen Chads Videos to help me understand. Thank you for everything you do, your time and your amazing way of explaining thi...”

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“So I cant find the words to describe how helpful this course has been. I mean for every science class that I've taken I have seen Chads Videos to help me understand. Thank you for everything you do, your time and your amazing way of explaining things in such a easy way. Thank you!!!”

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Instructor

I have been helping science and pre-health students excel for more than two decades. I have spent most of the last 15 years managing the tutoring facility for the Chemistry department at one of the largest universities in the country and continue to work there to this day. I help thousands of students in person in large groups, in small groups, and one-on-one every semester and this site is my attempt to help far more. Chemistry and Physics are not as difficult as you think...I promise! Try one of my FREE or premium courses today! Happy Studying!

Chad McAllister

Course curriculum

  • 02

    Chapter 2 - Measurement

    • Chapter 2 Study Guide

      FREE PREVIEW
    • 2.1 Significant Figures (14:08)

    • Significant Figures (5 Questions)

    • 2.2 Scientific Notation (13:47)

    • 2.3 Precision and Accuracy (3:37)

    • 2.4 Units and Conversions (42:03)

    • Conversions and Density (20 Questions)

  • 03

    Chapter 3 - Atoms, Molecules and Ions

    • Chapter 3 Study Guide

    • 3.1 Atomic Theory and Atomic Structure (23:04)

    • Atomic Structure (5 Questions)

    • Atomic and Molecular Weights (4 Questions)

    • 3.2 Introduction to the Periodic Table (7:44)

    • 3.3 Naming Compounds [Nomenclature] (37:34)

    • Nomenclature of Ionic Compounds (6 Questions)

    • Nomenclature of Molecular Compounds (6 Questions)

    • Nomenclature of Acids (6 Questions)

    • Nomenclature Summary Quiz (23 Questions)

  • 04

    Chapter 4 - Chemical Reactions

    • Chapter 4 Study Guide

    • 4.1 Balancing Chemical Reactions (8:21)

    • Balancing Chemical Equations Worksheet

    • 4.2 Types of Chemical Reactions (18:36)

    • Chemical Reactions (6 Questions)

    • 4.3 Oxidation-Reduction Reactions (20:35)

    • Oxidation-Reduction Reactions (12 Questions)

    • 4.4 Double Replacement Reactions (47:44)

    • Double Replacement Reactions (8 Questions)

  • 05

    Chapter 5 - Stoichiometry

    • New Lectures Coming Soon

    • Chapter 5 Study Guide

    • 5.1 Reactions and Calculations With Moles (20:32)

    • Calculations with Moles (9 Questions)

    • 5.2 Mass Percents and Empirical and Molecular Formulas (10:19)

    • Mass Percents and Empirical and Molecular Formulas Quiz (8 Questions)

    • 5.3 Limiting Reagent Calculations (16:04)

    • Limiting Reagent Calculations (11 Questions)

    • Stoichiometry Chapter Summary Test (23 Questions)

  • 06

    Chapter 6 - Thermochemistry

    • New Lectures Coming Soon

    • Chapter 6 Study Guide

    • 6.1 The First Law of Thermodynamics, Enthalpy, and Phase Changes (15:43)

    • First Law of Thermodynamics (7 Questions)

    • 6.2 Calorimetry (18.03)

    • Calorimetry (8 Questions)

    • 6.3 Hess's Law and Enthalpies of Formation (19:17)

    • Hess's Law (3 Questions)

    • Enthalpies of Formation (4 Questions)

    • Thermochemistry Chapter Summary Test (17 Questions)

  • 07

    Chapter 7 - Electronic Structure

    • New Lectures Coming Soon

    • Chapter 7 Part 1 Study Guide

    • Chapter 7 Part 2 Study Guide

    • 7.1 Electromagnetic Radiation and the Photoelectric Effect (16:24)

    • Electromagnetic Radiation (11 Questions)

    • 7.2 Electronic Transitions (Absorption and Emission) (15:06)

    • Electronic Transitions (3 Questions)

    • 7.3 The de Broglie Relation, the Heisenberg Uncertainty Principle, and Orbitals (5:45)

    • de Broglie Relation and Heisenberg Uncertainty Principle (2 Questions)

    • 7.4 Quantum Numbers (13:29)

    • Quantum Numbers (5 Questions)

    • 7.5 Electronic Configurations (20:12)

    • Electronic Configurations (21 Questions)

    • 7.6 Overview of Trends and Atomic Radius (24:36)

    • Atomic and Ionic Radius (8 Questions)

    • 7.7 Ionization Energy (13:01)

    • Ionization Energy (6 Questions)

    • 7.8 Electron Affinity, Electronegativity, and Descriptive Chemistry (10:28)

    • Electron Affinity and Electronegativity (6 Questions)

    • Descriptive Chemistry (8 Questions)

    • Electronic Structure Chapter Summary Test (26 Questions)

    • Periodic Properties of the Elements Chapter Summary Test (23 Questions)

  • 08

    Chapter 8 - Chemical Bonds

    • New Lectures Coming Soon

    • Chapter 8 Part 1 Study Guide

    • Chapter 8 Part 2 Study Guide

    • 8.1 Bonding and Lattice Energy (17:31)

    • Bonding and Lattice Energy (8 Questions)

    • 8.2 Lewis Dot Structures (40:07)

    • Lewis Dot Structures (10 Questions)

    • 8.3 Bond Enthalpies

    • 8.4 VSEPR Theory and Molecular Geometry (19:11)

    • Molecular Geometry (17 Questions)

    • 8.5 Hybridization (11:38)

    • 8.6 Polarity (12:26)

    • 8.7 Sigma and Pi Bonds (7:08)

    • Hybridization, Sigma and Pi Bonds, and Polarity (14 Questions)

    • Bonding and Lewis Structures Chapter Summary Test (16 Questions)

    • Molecular Geometry Chapter Summary Test (8 Questions)

  • 09

    Chapter 9 - Gases

    • New Lectures Coming Soon

    • Chapter 9 Study Guide

    • 9.1 Properties of Gases and the Ideal Gas Law (18:53)

    • 9.2 Gas Laws (20:26)

    • Properties of Gases and Gas Laws (7 Questions)

    • 9.3 Partial Pressures, Density, and the Volume of Ideal Gases at STP (14:36)

    • Partial Pressures, Densities, and Molar Masses of Ideal Gases (7 Questions)

    • 9.4 Graham's Law of Effusion and Real Gases (14:21)

    • Graham's Law of Effusion (2 Questions)

    • Gases Chapter Summary Test (12 Questions)

  • 10

    Chapter 10 - Solids and Liquids

  • 11

    Chapter 11 - Solutions

    • New Lectures Coming Soon

    • Chapter 11 Study Guide

    • 11.1 Solubility and the Solution Process (4:19)

    • 11.2 Solutions Vocabulary (2:42)

    • 11.3 Temperature and Pressure Effects on Solubility (3:29)

    • 11.4 Expressing Concentration (8:02)

    • 11.5 Introduction to Colligative Properties, the van't Hoff factor, and Molallity (16:55)

    • Molality and Introduction to Colligative Properties (7 Questions)

    • 11.6 Calculations Involving Freezing Point Depression and Boiling Point Elevation (7:49)

    • Calculations Involving Freezing Point Depression and Boiling Point Elevation (7 Questions)

    • 11.7 Vapor Pressure Depression and Raoult's Law (5:37)

    • Vapor Pressure Depression and Raoult's Law (2 Questions)

    • 11.8 Osmotic Pressure (7:56)

    • Solutions and Colligative Properties Chapter Summary Test (8 Questions)

  • 12

    Chapter 12 - Acids and Bases

    • New Lectures Coming Soon

    • Chapter 12 Study Guide

    • 12.1 Introduction to Acids and Bases (31:24)

    • Introduction to Acids and Bases (8 Questions)

    • 12.2 Introduction to the pH Scale and pH Calculations (13:15)

    • Introduction to the pH Scale and pH Calculations (12 Questions)

    • 12.3 pH Calculations for Strong Acids and Bases (13:11)

    • pH Calculations for Strong Acids and Bases (8 Questions)

    • 12.4 pH Calculations for Weak Acids and Bases (32:53)

    • pH Calculations for Weak Acids and Bases (11 Questions)

    • 12.5 Acidity and Basicity of Salts (13:43)

    • Acidity and Basicity of Salts (3 Questions)

    • Acid-Base Equilibria Chapter Summary Test (42 Questions)

  • 13

    Chapter 13 - Chemical Equilibrium

    • New Lectures Coming Soon

    • Chapter 13 Study Guide

    • 13.1 Equilibrium and Equilibrium Constants (19:09)

    • Equilibrium and Equilibrium Constants (15 Questions)

    • 13.2 Le Chatelier's Principle (14:55)

    • Le Chatelier's Principle (5 Questions)

    • 13.3 Equilibrium Calculations (22:36)

    • Equilibrium Calculations (8 Questions)

    • Chemical Equilibrium Chapter Summary Test (26 Questions)

  • 14

    Chapter 14 - Oxidation and Reduction

    • New Lectures Coming Soon

    • Chapter 14 Study Guide

    • 14.1 Oxidation-Reduction Reactions and Oxidation States (11:16)

    • Oxidation-Reduction Reactions and Oxidation States (11 Questions)

    • 14.2 Balancing Oxidation-Reduction Reactions (30:28)

    • Balancing Oxidation-Reduction Reactions (5 Questions)

    • 14.3 Galvanic Cells (20:34)

    • 14.4 Standard Cell Potentials (aka emf or Voltage) (14:43)

    • 14.5 Nonstandard Cell Potentials (the Nernst Equation) (12:05)

    • Galvanic Cells and Cell Potentials (9 Questions)

    • 14.6 Reduction Potentials and the Relationship between Cell Potential, Delta G, and the Equilibrium Constant (11:57)

    • Reduction Potentials (7 Questions)

    • 14.7 Electrolytic Cells (14:27)

    • 14.8 Electrolysis Calculations (9:00)

    • Electrolysis (8 Questions)

    • Electrochemistry Chapter Summary Test (41 Questions)

  • 15

    Chapter 15 - Nuclear Chemistry

    • New Lectures Coming Soon

    • Chapter 15 Study Guide

    • 15.1 Introduction to Nuclear Chemistry and Trends in Radioactivity (10:04)

    • 15.2 Balancing Nuclear Reactions (12:49)

    • Introduction to Nuclear Chemistry and Balancing Nuclear Reactions (5 Questions)

    • 15.3 Routes of Nuclear Decay, Fission, and Fusion (15:23)

    • Routes of Nuclear Decay, Fission, and Fusion (8 Questions)

    • 15.4 Kinetics of Nuclear Decay (15:44)

    • Kinetics of Nuclear Decay (4 Questions)

    • 15.5 Energy of Nuclear Reactions and Nuclear Binding Energy (13:56)

    • Nuclear Binding Energy (4 Questions)

    • Nuclear Chemistry Chapter Summary Test (15 Questions)

  • 16

    Chapter 16 - Organic Chemistry

    • Coming Soon!

  • 17

    Final Exam Review

    • Final Exam Review Study Guide

    • Nomenclature and Conversions (23:23)

    • Stoichiometry (29:53)

    • Thermochemistry (45:22)

    • Atomic and Electronic Structure (59:38)

    • Periodic Properties of the Elements (25:29)

    • Bonding and Molecular Structure (49:45)

    • Gases (45:09)

    • Liquids and Solids (34:06)

    • Solutions (1:05:55)

    • Chemical Equilibrium (42:06)

    • Acids and Bases (1:06:39)

    • Oxidation and Reduction (1:18:44)

    • Nuclear Chemistry (35:36)

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