Interactive science explorers
Move a slider, watch the particles, read the numbers. Each explorer is a working model for AP and intro college chemistry, with live graphs and a data table you can copy.
Set coefficients for ten equations and see atom counts and a mass balance beam respond.
Set reactant masses, find what runs out first, and compare theoretical and actual yield.
Change temperature, activation energy, and a catalyst. Read k, half-life, and the Arrhenius plot.
Disturb the N₂O₄ and NO₂ equilibrium and watch Q, K, and the shift to a new equilibrium.
Dilute a stock solution or dissolve a solid, and see molarity, color, and Beer's law absorbance.
Titrate strong and weak acids with NaOH. Follow the exact pH curve, indicators, and equivalence point.
Name and formula practice for 20 ionic compounds, with error diagnosis and a report.
Radius, ionization energy, electronegativity, and effective nuclear charge for elements 1 to 36.
Fill orbitals for elements 1 to 36 and their ions with Hund's rule, unpaired electrons, and Zeff.
Rotate 3D models of 13 shapes and read bond angles, hybridization, and polarity.