What's New in ChemWhiz

Versioning: 2.0 is a major update to the previously released ChemWhiz. Published updates from here bump the minor version (2.1, 2.2, and so on). Critical bug fixes ship immediately and are not given their own version entry.

Version 2.1

August 2026

Free, printable chemistry cheat sheets: a complete one-page reference for every general-chemistry topic, ready to view, download, and print.

New

Cheat sheets: a printable one-page cheat sheet for all 29 general-chemistry topics, plus a Final Exam Review roadmap (30 in all), free to view and download as a PDF in both US Letter and A4. Each sheet distills the core rules, key methods, reference data, and common pitfalls for its topic, and links back to the free practice page. Browse them all on the Cheat Sheets page.
Name That Compound: a free chemical nomenclature practice tool, no account needed. Name ionic, molecular, and acid compounds, or flip it around and write the formula, and get instant grading with the rule behind every answer. Drill one family at a time or mix them all. Find it on the Tools page.

Expanded and improved

Reference tables: the standard thermodynamic properties table is now a focused, category-organized general-chemistry set that's quicker to scan, and the bond-energies table now lists bond lengths for most bonds (previously only a few). Chemical formulas and source citations across the reference pages render more cleanly.

Version 2.0

July 2026

The biggest update to ChemWhiz yet: a new interactive practice experience, a much larger reference library with interactive charts, and a full accuracy review of every chemistry claim on the site.

New

Practice (Study): a full set of practice problems for every topic, with worked examples for each learning objective. Create a free account to explore them; a subscription unlocks instant answer grading from a grading engine built specifically for chemistry, with step-by-step feedback on what to fix next.
Interactive reference charts: explore solubility curves, titration curves, and phase diagrams as interactive graphics, not just numbers in a table.

Expanded and improved

Reference library: more than doubled, from 9 tables to 22, including common ions, solubility rules, standard reduction potentials, bond energies, solubility products (Ksp), acid and base constants, formation constants, and thermodynamic data. Sort any column, filter by category, search the longer tables, and see the source behind each one.
Accuracy, everywhere: a full review of the chemistry across all 118 element pages, the element guides, the reference tables, and the 30 Learn topics, checked against authoritative sources (IUPAC, NIST, OpenStax, and the Royal Society of Chemistry), with outdated and overstated claims corrected.
Sources you can check: reference tables and guides now cite where their data comes from, with links to the originals.
Better on mobile: wide tables scroll cleanly, headers stay in view while you read, and pages fit small screens without sideways scrolling.
Easier to find: clearer page titles, descriptions, and search information across the site.