September 15, 2026In chemistry, matter is anything with mass that takes up space. See what counts, what does not, and how elements,…- September 8, 2026A cation is a positively charged ion formed by losing electrons; an anion is negatively charged and forms by gaining…
- September 1, 2026Solubility is the maximum amount of a solute that dissolves in a given amount of solvent at a stated temperature.…
- August 31, 2026A free eight-step infographic explaining how a titration finds an unknown concentration, with a worked example and embed code to…
- August 25, 2026Aqueous means dissolved in water, written (aq) in equations. Learn the state symbols, how ions dissociate, and why liquid water…
- August 18, 2026Reactants are the starting substances used up in a chemical reaction. See how to read them in an equation, plus…
- August 11, 2026The solute is what dissolves, the solvent does the dissolving, and the solution is the mixture that results. A clear…
- August 4, 2026A solvent is the substance present in the greatest amount in a solution, the one that does the dissolving. How…
August 1, 2026Endothermic reactions absorb heat and cool surroundings (delta H positive). Exothermic reactions release heat and warm surroundings (delta H negative).- July 27, 2026Stoichiometry uses a balanced equation and mole ratios to predict amounts of reactants and products. Learn the method step by…
- July 22, 2026Learn how to write electron configurations step by step. Master the Aufbau order, Pauli and Hund rules, noble-gas shorthand, and…
- July 18, 2026A mole is 6.022 x 10^23 particles, the number chemists use to count atoms and molecules. Learn what a mole…
