Chemical Equilibrium

Learn how reversible reactions reach a state where the forward and reverse rates are equal, and concentrations remain constant.

Equilibrium Constants

Understand the expression of equilibrium using Kc and Kp, and what these values reveal about reaction extent.

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Conversions Between Equilibrium Constants

Learn how to convert between different forms of equilibrium constants, such as Kc, Kp, and inverse constants, depending on reaction conditions and stoichiometry.

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Factors affecting Equilibrium Position

Explore how changes in concentration, temperature, and pressure shift equilibrium according to Le Chatelier’s Principle.

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Varying Definitions of Acids & Bases

Compare the Arrhenius, Brønsted-Lowry, and Lewis definitions of acids and bases.

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Acidity and Basicity Constants and the pH Scale

Understand how Ka, Kb, and pH describe the strength of acids and bases in solution.

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Buffer Solutions and the Henderson-Hasselbach Equation

Learn how buffers resist pH changes and how their behavior can be modeled mathematically.

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pH indicators

Study substances that change color with pH, and how they are used to estimate acidity or basicity.

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Acid-base Titrations

Quantitative analysis using neutralization reactions between acids and bases with indicators.

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Solubility Equilibra

Learn how slightly soluble salts establish equilibrium between solid and dissolved ions.

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Ready to take IJSO-style chemical equilibrium practice questions?

Apply your knowledge with our collection of IJSO-style chemical equilibrium problems.

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Ready to take IJSO-style chemical equilibrium and electrochemistry mock tests?

Challenge yourself with our collection of IJSO-style mock tests in chemical equilibrium and electrochemistry, designed to test your problem-solving skills and understanding.

View Chemical Equilibrium and Electrochemistry Mock Tests