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Step-by-Step Guidance for ACS Chemistry Exam Questions

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Classification of Matter

  • Types of Matter
    01:34
  • Introduction to General Chemistry Course
    1:44
  • Matter Composition
    04:19

Physical & Chemical Changes

  • Chemical Change Example
    01:52
  • Reversible Changes in Matter
    03:42
  • Physical Change Example
    01:52

Mole Concept

  • Moles and Particles Conversion
    02:41
  • Moles to Molecules Conversion Example
    01:41
  • Formula Unit Example
    01:28

The Atom

  • The Nucleus
    02:53
  • Atom Structure
    02:10
  • Atom Structure Example
    02:52

Subatomic Particles

  • Subatomic Particles
    05:19
  • Atomic Mass Unit Example
    03:31

Isotopes

  • Isotopes
    04:36
  • Isotope Notation Example
    03:57

Atomic Mass

  • Calculating Abundance Example
    5:41
  • Greatest Atomic Mass Example
    02:06
  • Calculating Atomic Mass
    00:40

Empirical Formula

  • Empirical Formula Calculation Example
    5:39
  • Empirical vs Molecular Formula
    02:26

Molecular Formula

  • Molecular Formula Calculation Example
    6:53
  • Determining Molecular Formulas
    02:08

Calculating Molar Mass

  • Molar Mass Concept
    02:11
  • Molar Mass Calculation Example
    03:12

Balancing Chemical Equations

  • Balancing Chemical Equations
    01:32
  • Balancing Chemical Equations Example
    03:50

Stoichiometry

  • Stoichiometry Example
    3:54
  • Stoichiometry Concept
    01:16
  • Stoichiometric Chart Concept
    03:04

Limiting Reagent

  • Limiting Reagent Example
    4:53
  • Limiting Reagent Concept
    01:30
  • Limiting Reagent in Reactions
    01:34

Percent Yield

  • Percent Yield in Reactions
    03:09
  • Percent Yield Example
    04:43

Mass Percent

  • Mass Percent Example
    1:22
  • Mass Percent Calculation
    00:38

Chemical Bonds

  • Chemical Bonds Example 3
    01:04
  • Chemical Bonds
    02:03
  • Chemical Bonds Example 2
    01:18

Lewis Dot Symbols

  • Lewis Dot Symbols
    03:17
  • Lewis Dot Symbols Example 1
    00:50
  • Lewis Dot Symbols Example 2
    01:26

Octet Rule

  • Octet Rule
    02:38
  • Octet Rule Example 1
    01:42
  • Octet Rule
    01:36

Lewis Dot Structures: Neutral Compounds

  • Lewis Dot Structures: Neutral Compounds
    05:56
  • Lewis Dot Structures: Neutral Compounds Example 1
    00:40

Lewis Dot Structures: Sigma & Pi Bonds

  • Lewis Dot Structures: Sigma & Pi Bonds Example 1
    00:43
  • Lewis Dot Structures: Sigma & Pi Bonds
    03:26

Resonance Structures

  • Resonance Structures
    01:42
  • Resonance Structures Example 1
    01:54
  • Resonance Structures Example 2
    02:19

Valence Electrons of Elements

  • Main Group Elements Valence Electrons Example
    01:14
  • Transition Metals Valence Electrons
    02:12
  • Transition Metals Valence Electrons Example
    02:14

Periodic Table: Classifications

  • Nonmetal Properties
    01:12
  • Periodic Table Classifications
    02:40
  • Metalloid Properties
    03:37

Periodic Table: Group Names

  • Periodic Table: Group Names
    05:33
  • Periodic Table: Group Names Example
    01:17

Periodic Table: Representative Elements & Transition Metals

  • Transition Metal Example
    01:23
  • Transition Metals and Representative Elements
    03:30

Periodic Trend: Atomic Radius

  • Atomic Radius Trends
    01:42
  • Atomic Radius Example
    00:56
  • Atomic Radius
    02:02

Periodic Trend: Ionization Energy

  • Ionization Energy Trends
    01:08
  • Group 6A vs. Group 5A Elements
    01:32
  • Ionization Energy
    01:19

Periodic Trend: Electronegativity

  • Electronegativity Trends
    02:10
  • Electronegativity Example
    00:35

Intermolecular Forces

  • Intermolecular vs Intramolecular Forces
    01:59
  • Intermolecular vs Intramolecular Example
    2:04
  • Intermolecular Forces Example
    01:59

Intermolecular Forces and Physical Properties

  • Intermolecular Forces & Physical Properties
    01:04
  • Intermolecular Forces and Properties
    03:13
  • Melting Point Example
    01:21

Gas Stoichiometry

  • Gas Stoichiometry Chart
    02:05
  • Gas Stoichiometry Concepts
    00:47
  • Gas Stoichiometry Calculation Example
    03:51

The Ideal Gas Law

  • Ideal Gas Law Units Example
    02:58
  • Ideal Gas Law Formula
    01:15
  • Gas Constant Values
    01:56

Solutions

  • Identify Mixtures Example
    01:16
  • Suspensions and Colloids
    02:38
  • Solution Components Example
    1:17

Molarity

  • Calculate Molarity Example
    01:46
  • Molarity
    01:13
  • Molarity Concept
    00:53

Dilutions

  • Dilution Calculation Example
    02:36
  • Dilution Equation
    00:58
  • Solution Dilution Process
    01:03

Solubility Rules

  • Solubility Rules
    00:28
  • Soluble Ionic Solutes Example
    01:32
  • Soluble Ionic Solutes
    02:30

Electrolytes

  • Weak Electrolytes and Weak Acids
    00:55
  • Weak Electrolyes and Weak Acids Example
    00:42
  • Electrolytes and Strong Acids
    02:50

Intro to Chemical Equilibrium

  • Chemical Equilibrium Example
    01:18
  • Chemical Equilibrium Concepts
    04:20

Equilibrium Constant K

  • Equilibrium Constant K
    01:14
  • Equilibrium Constant Expressions
    03:20
  • Equilibrium Constant Expressions Example
    01:07

Le Chatelier's Principle

  • Temperature and Equilibrium Shifts
    04:04
  • Le Chatelier's Principle
    07:32
  • Disturbances and Equilibrium Shifts Example
    02:50

Acids Introduction

  • Acid Structure and Types
    02:29
  • Acid Characteristics
    02:59
  • Acid Characteristics Example
    01:23

Bases Introduction

  • Strong Bases Example
    01:12
  • Base Properties
    01:57
  • Base Structure Example
    01:16

Arrhenius Acids and Bases

  • Acid-Base Dissociation Example
    00:54
  • Arrhenius Acids and Bases
    02:00

Bronsted-Lowry Acids and Bases

  • Acid-Base Classification Example
    02:56
  • Bronsted-Lowry Acids and Bases Example
    01:10
  • Strength of Conjugate Acids and Bases
    00:50

Lewis Acids and Bases

  • Lewis Acids and Bases
    05:04
  • Lewis Acid-Base Identification Example
    02:30
  • The Adduct
    03:50

The pH Scale

  • pH Calculation Example
    02:15
  • Least Acidic Solution Example
    00:48
  • Additional pH and pOH Calculations
    00:58

Ka and Kb

  • Ka and Kb Example
    01:31
  • Characteristics of Ka and Kb
    03:50
  • Ka and Kb Relationship
    03:01

pH of Strong Acids and Bases

  • pOH Calculation Example
    01:18
  • pH of Strong Acids and Bases
    02:39

pH of Weak Acids

  • Calculating Percent Ionization of Weak Acids
    01:15
  • Percent Dissociation Example
    04:52
  • Hydronium Ion Concentration Example
    06:25

pH of Weak Bases

  • Calculating Percent Ionization of Weak Bases
    01:00
  • Hydroxide Ion Concentration Example
    06:12
  • ICE Charts of Weak Bases
    00:51

Intro to Buffers

  • Buffer Solution Example
    02:41
  • Buffer Capacity
    00:45
  • Buffer Creation Methods
    03:04

Henderson-Hasselbalch Equation

  • Buffer Range Calculation
    02:47
  • Buffering Range Example
    01:22
  • Henderson-Hasselbalch Equation
    02:40

Intro to Acid-Base Titration Curves

  • Equivalence Point Example
    01:35
  • Acid-Base Titration Curve Example
    01:35
  • Equivalence Point in Titration
    03:06

Strong Titrate-Strong Titrant Curves

  • Strong Titrate-Strong Titrant Curve Example
    02:56
  • Strong Acid-Strong Base Titration Curve
    02:32
  • Strong Titrate-Strong Titrant Curve
    02:09

Weak Titrate-Strong Titrant Curves

  • Weak Titrate-Strong Titrant Curve Example
    02:08
  • Acid-Base Titration Formulas Example
    03:01
  • Weak Acid-Strong Base Titration Curve
    02:19

Acid-Base Indicators

  • Acid-Base Indicators
    04:30
  • Best Indicator Example
    00:52

Titrations: Weak Acid-Strong Base

  • At the Equivalence Point
    01:07
  • Before the Equivalence Point
    01:30
  • pH at the Equivalence Point Example
    08:27

Titrations: Weak Base-Strong Acid

  • pH Before the Equivalence Point Example
    05:10
  • After the Equivalence Point
    00:53
  • pH at the Equivalence Point Example
    07:28

Titrations: Strong Acid-Strong Base

  • Strong Acid-Strong Base Titration Example
    04:43
  • Strong Acid-Strong Base Titration
    01:09

Solubility Product Constant: Ksp

  • Solubility Product Constant
    01:47
  • Molar Solubility Example
    04:13
  • Ksp Calculations
    01:51

Ksp: Common Ion Effect

  • Common Ion Effect Example
    03:39
  • Common Ion Effect in Acids and Bases
    00:33
  • Solubility at Buffered pH Example
    05:30

Precipitation: Ksp vs Q

  • Ksp vs Q in Precipitation
    03:05
  • Precipitation: Ksp vs Q Example
    03:12

Spontaneous vs Nonspontaneous Reactions

  • Spontaneity of Processes Example
    03:05
  • Spontaneity of Processes
    04:20

Entropy

  • Second Law of Thermodynamics Example
    00:48
  • Entropy and Physical Changes
    02:35
  • Standard Molar Entropy Example
    01:17

Gibbs Free Energy

  • Spontaneity of Reactions
    03:38
  • ΔG and Spontaneity Example
    01:23
  • Spontaneity and Temperature Example
    02:42

Gibbs Free Energy Calculations

  • The Gibbs Free Energy Formula
    00:44
  • Standard Gibbs Free Energy and Temperature
    00:32
  • The Gibbs Free Energy Formula Example
    01:29

Gibbs Free Energy And Equilibrium

  • ∆G° and K Example
    01:13
  • ∆G° and K
    01:19
  • ∆G, ∆G° and Q
    01:03

Standard Reduction Potentials

  • Comparing Standard Reduction Potentials
    03:13
  • Standard Reduction Potentials Example
    01:51
  • Standard Reduction Potentials
    01:10

Intro to Electrochemical Cells

  • Electrochemical Cells Example
    01:01
  • Cell Potential and Spontaneity
    02:32
  • Electrochemical Cells
    02:46

Galvanic Cell

  • Galvanic Cell Components
    03:55
  • Galvanic Cell and Spontaneity
    03:04
  • Galvanic Cell Components Example
    02:22

Electrolytic Cell

  • Electrolytic Cell Example
    00:45
  • The Electrolytic Cell
    01:21
  • Electrolytic Cells and Spontaneity Example
    01:24

Cell Potential: Standard

  • Standard Cell Potential
    01:27
  • Standard Cell Potential and Spontaneity
    01:46
  • Standard Cell Potential Example
    01:34

Cell Potential: The Nernst Equation

  • The Reaction Quotient
    01:01
  • The Nernst Equation Example
    04:38
  • The Nernst Equation
    01:17

Cell Potential and Gibbs Free Energy

  • Faraday's Constant in Electrochemistry Example
    02:11
  • Cell Potential and Gibbs Free Energy Example
    03:18
  • Faraday's Constant in Electrochemistry
    01:40

Cell Potential and Equilibrium

  • Cell Potential and Equilibrium
    02:38
  • Cell Potential and Equilibrium Example
    02:17

Cell Potential: G and K

  • Relationship between ∆E°, ∆G°, and K
    02:43
  • Relationship between ∆E°, ∆G°, and K Example
    02:57

Cell Notation

  • Cell Notation
    06:23
  • Cell Notation Example
    01:49

Electroplating

  • Electrochemical Stoichiometric Chart (Mass) Example
    02:26
  • Electrochemical Stoichiometric Chart (Mass)
    01:16
  • Electroplating Example
    01:16

Intro to Radioactivity

  • Nuclear Reaction Example
    00:45
  • Understanding Nuclear Reactions
    01:44
  • Nuclear vs Chemical Reactions
    01:08

Alpha Decay

  • Alpha Decay
    03:53
  • Characteristics of Alpha Particles
    02:48
  • Alpha Decay Reaction Example
    01:22

Beta Decay

  • Beta Decay Reaction Example
    01:21
  • Beta Decay
    03:01
  • Characteristics of Beta Particles Example
    01:02

Gamma Emission

  • Gamma Emission Reaction Example
    02:16
  • Characteristics of Gamma Rays
    01:35
  • Characteristics of Gamma Rays Example
    01:21

Electron Capture & Positron Emission

  • Positron Emission
    01:53
  • Electron Capture
    01:26
  • Electron Capture & Positron Emission Reaction Example
    03:29

Neutron to Proton Ratio

  • Neutron-Proton Ratio
    02:14
  • Neutron-to-Proton Plot
    01:38
  • Stable Nucleus Example
    01:40

Band of Stability: Alpha Decay & Nuclear Fission

  • Band of Stability: Alpha Decay
    01:46
  • Band of Stability: Nuclear Fission
    03:29
  • Band of Stability: Alpha Decay Example
    01:16

Band of Stability: Beta Decay

  • Band of Stability: Beta Decay Example
    01:11
  • Band of Stability: Beta Decay
    01:13

Band of Stability: Electron Capture & Positron Emission

  • Band of Stability: Electron Capture Example
    00:48
  • Band of Stability: Electron Capture
    02:04

Band of Stability: Overview

  • Band of Stability: Overview Example
    02:10
  • Band of Stability: Atomic Forces
    02:32
  • Intepreting the Band of Stability
    03:13

Measuring Radioactivity

  • Units of Radiation Measurement
    02:52
  • Radiation Measurement Units Conversion Example
    00:33

Rate of Radioactive Decay

  • Rate of Radioactive Decay Example
    02:25
  • Rate of Radioactive Decay
    03:00

Radioactive Half-Life

  • Method 3 of Radioactive Half-Life Example
    04:26
  • Intro to Radioactive Half-Life
    01:30
  • Method 1 of Radioactive Half-Life Example
    00:55

Mass Defect

  • Mass Defect Example
    01:35
  • Calculating Mass Defect
    00:55
  • Calculating Mass Defect Example
    03:08

Nuclear Binding Energy

  • Nuclear Binding Energy
    02:06
  • Nuclear Binding Energy Example
    03:50