UNDERSTAND THE WHY
HESI A2 Chemistry Study Guide
Clear explanations. Worked examples. Practice as you learn.
Start with the idea, follow an example, then check your understanding. Use the diagnostic when you want help deciding what comes next.
Matter: composition versus physical form
2 understanding checks
Scientific notation, units and measured precision
4 understanding checks · Optional video explanation
Atomic identity, isotopes and charge
4 understanding checks · Optional video explanation
Reading periodic organization
2 understanding checks · Optional video explanation
Bonds within particles and attractions between them
4 understanding checks
Formulas, coefficients and atom conservation
4 understanding checks · Optional video explanation
Recognizing reaction patterns
3 understanding checks · Optional video explanation
Reaction rates and dynamic equilibrium
2 understanding checks
Concentration with the correct denominator
4 understanding checks
Amounts, molar masses and reaction ratios
3 understanding checks · Optional video explanation
Electron transfer and redox roles
1 understanding checks · Optional video explanation
Proton transfer, pH and neutralization
2 understanding checks · Optional video explanation
Nuclear emissions and repeated half-lives
3 understanding checks · Optional video explanation
Chemical features of biological molecules
3 understanding checks · Optional video explanation
One next step is enough.
Not sure what to study? Start with a diagnostic. Already know? Open a guide and begin.