Buffers, titrations, and solubility equilibria (Khan Academy)

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We can combine our knowledge of acids and bases, equilibrium, and neutralization reactions to understand buffers and titrations. Solubility equilibria will build on concepts from solubility, precipitation, and equilibrium. (1) Buffer solutions Introduction to buffers Buffers, the acid rain slayer Common ion effect and buffers Buffers and Henderson-Hasselbalch Buffer solution pH calculations pH and pKa […]

Acids and bases (Khan Academy)

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In this section we will be talking about the basics of acids and bases and how acid-base chemistry is related to chemical equilibrium. We will cover acid and base definitions, pH, acid-base equilibria, acid-base properties of salts, and the pH of salt solutions. (1) Acids, bases, and pH Arrhenius acids and bases Arrhenius definition of […]

Chemical equilibrium (Khan Academy)

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Many chemical reactions are reversible, and the forward and backward reactions can occur at the same time. When the rate of the forward reaction is equal to the rate of the backward reaction, we call that a dynamic equilibrium. We will learn how equilibrium can be described by the equilibrium constant K, and how different […]

States of matter and intermolecular forces (Khan Academy)

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Have you ever wondered how some insects are able to “skate” on the surface of water? We will learn about how intermolecular forces make this possible. We will also cover liquids, solids, mixtures, and phase changes. (1) States of matter States of matter States of matter follow-up Specific heat and latent heat of fusion and […]

Gases and kinetic molecular theory (Khan Academy)

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Properties of gases can be modeled using some relatively simple equations, which we can relate to the behavior of individual gas molecules. We will learn about the ideal gas law, vapor pressure, partial pressure, and the Maxwell Boltzmann distribution. (1) Ideal gas equation Ideal gas equation: PV = nRT Deflate gate Ideal gas equation example […]

Chemical bonds (Khan Academy)

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Chemical bonds are the glue that hold molecules together. We will learn about the different kinds of bonds, ways chemists draw bonds and molecules, and how the type of chemical bonding affects the bulk properties of a material. We will cover electronegativity, Lewis dot structures, VSEPR, bond hybridization, and ionic, covalent, and metallic bonds. (1) […]

Periodic table (Khan Academy)

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A little more than a century ago, the chemist Dmitri Mendeleev published an early form of the periodic table, which organizes the known elements of our world. His method of classifying the elements was so useful that we still use it even today. We will learn to apply this elegant table to an understanding of […]

Electronic structure of atoms (Khan Academy)

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So we know that all matter is made up of atoms, but what is an atom made out of? Chemists describe the structure of atoms using models. This section will cover the Bohr model, photoelectric effect, absorption and emission spectra, quantum numbers, and electron configurations. (1) History of atomic structure The history of atomic chemistry […]

Chemical reactions and stoichiometry (Khan Academy)

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We are now going to delve into the heart of chemistry. We learn ways of representing molecules and how molecules react. To do this, we’ll even think about “how many” of a molecule we have using a quantity called a “mole”. (1) Balancing chemical equations Chemical reactions introduction Balancing Chemical Equations Intuition Balancing chemical equations […]

Atoms, compounds, and ions (Khan Academy)

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Chemistry is the study of matter, and all matter is made up of atoms. We will learn about elements, atomic number and mass, isotopes, moles (chemistry moles, not the animal), and compounds. (1) Introduction to the atom Introduction to chemistry Preparing to study chemistry Elements and atoms Atomic number, mass number, and isotopes Isotopes and […]