AP Chemistry Unit 4 Practice
AP Chemistry · Unit 4
Catch up at your own pace.
Choose one topic for six questions, or Mixed review for all 54. Read the feedback after each answer.
No timer. Use scratch paper and a calculator. All the atomic masses you need are below.
Your set is complete
Results by topic
Reference
Atomic masses (g/mol)
Use these values. Keep extra digits in your work and round only the final answer.
- H
- 1.01
- C
- 12.01
- N
- 14.01
- O
- 16.00
- Na
- 22.99
- Mg
- 24.31
- Al
- 26.98
- S
- 32.06
- Cl
- 35.45
- K
- 39.10
- Ca
- 40.08
- Fe
- 55.85
Avogadro constant: 6.022 × 1023 mol−1
Solubility rules for 4.2
- For dilute aqueous solutions near room temperature: Group 1, ammonium and nitrate salts are soluble.
- Chlorides are generally soluble except those of Ag, Pb and Hg(I). Sulfates are generally soluble except those of Ba, Sr and Pb. CaSO4: limited solubility.
- Carbonates and phosphates are generally insoluble except Group 1 and ammonium salts. Hydroxides are generally insoluble except Group 1; Ca, Sr and Ba hydroxides are more soluble. These are guidelines; use any specific data in a prompt.
Keep weak acids, solids and pure liquids intact in ionic equations. Separate soluble strong electrolytes into ions and cancel only unchanged spectator ions.
Molarity = moles / liters of solution. Use balanced coefficients for mole ratios. Percent yield = actual yield / theoretical yield × 100.
Aligned practice for AP Chemistry CED topics 4.1 to 4.9. Original ZornScience questions.
About this activity
Review AP Chemistry Unit 4, Chemical Reactions, with 54 original questions. Each answer gets an explanation right away, and your score is broken down by topic.
Related lessons
- Unit 4: Chemical ReactionsAP Chemistry