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Mole Concept & Stoichiometry Calculator
Convert between grams, moles, and particles. Determine limiting/excess reagents with 4 preset reactions. Calculate theoretical yield and percent yield.
Isotope Notation & Average Atomic Mass
Explore isotope notation for 7 elements. See mass number, atomic number, proton/neutron counts, and calculate weighted average atomic mass from natural abundances.
Net Ionic Equation Builder
Step-by-step builder for net ionic equations from 6 reaction examples. Walk through molecular equation → complete ionic equation → identify spectator ions → net ionic equation. Covers precipitation, acid-base neutralization, and gas evolution reactions with solubility rules reference.
pH Scale & Indicator Color Simulator
Interactive pH scale with 10 common acid-base indicators displayed as color-changing test tubes. Slide pH from 0-14 to see real-time color transitions for methyl violet, thymol blue, methyl orange, bromocresol green, methyl red, litmus, bromothymol blue, phenol red, phenolphthalein, and alizarin yellow R. Calculates [H⁺], [OH⁻], and pOH.