Chemistry Blog
27 in-depth guides on chemistry concepts, study strategies, and step-by-step problem solving techniques.
How to Draw Lewis Structures: Step-by-Step Guide with Examples
A clear, step-by-step method for drawing Lewis structures for any molecule or ion, with worked examples and common pitfalls.
How to Balance Chemical Equations: 5 Methods That Work
Five reliable methods for balancing chemical equations, from simple inspection to algebraic approaches for complex reactions.
The Mole Concept Explained: From Avogadro to Stoichiometry
A practical explanation of the mole concept, Avogadro's number, molar mass, and how to convert between grams, moles, and particles.
Molecular Geometry and VSEPR Theory: Predicting Shapes
How to use VSEPR theory to predict molecular shapes from Lewis structures, with all five electron geometries and their molecular shapes explained.
Dimensional Analysis in Chemistry: The Unit Conversion Method
Master dimensional analysis for chemistry. Learn how to set up conversion factors, chain conversions, and avoid unit errors in stoichiometry problems.
Organic Chemistry Naming: IUPAC Nomenclature Made Simple
A practical guide to IUPAC nomenclature for organic molecules, covering alkanes, alkenes, alkynes, and common functional groups.
How to Study Chemistry: Methods That Actually Work
Evidence-based study strategies specifically designed for chemistry, covering problem practice, concept mapping, active recall, and how to use AI tools effectively.
Chemistry Lab Safety: Rules, Equipment, and Common Mistakes
Essential chemistry lab safety rules covering PPE, chemical handling, equipment use, emergency procedures, and the most common safety mistakes students make.
ICE Tables in Chemistry: Step-by-Step Equilibrium Setup
A practical walkthrough for setting up ICE tables correctly for Kc and Ka problems.
Q vs K in Chemistry: Predict Reaction Direction Quickly
How to use the reaction quotient and equilibrium constant to predict whether a reaction shifts left or right.
Calorimetry at Constant Pressure: Step-by-Step Problem Method
A clear workflow for solving coffee-cup calorimetry problems with q = mcฮT and sign conventions.
How to Calculate pH from Ka and Kb: Practical Step-by-Step Method
A reliable method for solving weak acid and weak base pH problems using Ka, Kb, ICE setup, and approximation checks.
Empirical vs Molecular Formula: Step-by-Step from Percent Composition
Convert percent composition data into empirical and molecular formulas with a repeatable ratio method that reduces rounding errors.
Net Ionic Equations with Solubility Rules: Fast, Accurate Method
A structured method for writing molecular, complete ionic, and net ionic equations using core solubility rules.
Henderson-Hasselbalch Equation: Buffer pH Step-by-Step Guide
A practical method for buffer pH calculations, ratio setup, and common exam mistakes when using Henderson-Hasselbalch.
Oxidation Numbers in Chemistry: Rules, Tricks, and Worked Examples
Learn a reliable sequence for assigning oxidation numbers in compounds and ions, including exceptions and redox shortcuts.
Solubility Rules in Chemistry: Predicting Precipitation Reactions Quickly
A concise framework for using solubility rules to predict precipitates and write accurate complete and net ionic equations.
What Is the Difference Between Ionic and Covalent Bonds?
A clear comparison of ionic and covalent bonding including how they form, their properties, and how to identify them from formulas.
How to Calculate Molarity: Formula, Steps, and Practice Problems
A step-by-step guide to calculating molarity with the M = mol/L formula, dilution problems, and common exam mistakes to avoid.
What Is Electronegativity and Why Does It Matter in Chemistry?
Understand electronegativity, how it trends across the periodic table, and why it determines bond polarity, molecular shape, and reactivity.
Gas Laws Explained: Boyle's, Charles's, Avogadro's, and the Ideal Gas Law (PV = nRT)
A complete guide to the gas laws โ from the individual laws (Boyle's, Charles's, Gay-Lussac's, Avogadro's) to the combined gas law and the ideal gas law (PV = nRT). Covers derivations, unit pitfalls, worked problems, and when real gases deviate from ideal behavior.
Enthalpy, Entropy, and Gibbs Free Energy: A Complete Guide to Chemical Thermodynamics
Thermodynamics answers the most fundamental question in chemistry: will this reaction happen spontaneously? This guide explains enthalpy (ฮH), entropy (ฮS), and Gibbs free energy (ฮG) from the ground up โ what each one measures, how to calculate them, and how ฮG = ฮH - TฮS determines whether a reaction is spontaneous.
How to Balance Redox Reactions Using the Half-Reaction Method (Acidic and Basic Solutions)
Balancing redox reactions is one of the most challenging skills in general chemistry because you need to balance both atoms and charge simultaneously. The half-reaction method breaks this into manageable steps that work every time, in both acidic and basic solutions.
Rate Laws and Reaction Kinetics: How to Determine Reaction Order and Calculate Rate Constants
A rate law expresses how the speed of a chemical reaction depends on the concentration of reactants, with each reactant raised to an experimentally determined power called the reaction order โ you cannot determine reaction order from the balanced equation alone.
Organic Chemistry Functional Groups: Identification, Properties, and Reactivity Patterns
A functional group is a specific arrangement of atoms within a molecule that determines its chemical reactivity โ learning to recognize functional groups is the single most important skill in organic chemistry because every reaction mechanism, naming convention, and physical property prediction depends on identifying which functional groups are present.
Acid-Base Titration: How to Do the Calculation, Pick the Right Indicator, and Read the Curve
A hands-on guide to acid-base titration covering the math behind equivalence point calculations, how to choose the right indicator, and how to interpret titration curves for strong acid-strong base and weak acid-strong base combinations.
How to Solve Stoichiometry Problems: Mole-to-Mole, Mass-to-Mass, and Limiting Reagent
A systematic walkthrough of stoichiometry problem solving covering the mole ratio method, mass-to-mass conversions, limiting reagent identification, and percent yield calculations with worked examples.
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