HESI A2 Chemistry: bonding, solutions, and reactions at nursing prerequisite depth
25 scored · about 25 minutes, about 25 minutes for 25 scored items
This guide covers Chemistry on HESI A2. Chemistry items focus on safe, practical ideas: pH, solutions, and reaction types you will meet in prerequisites. Use our HESI A2 Chemistry Exams practice quizzes to rehearse with rationales.
Official HESI information: Elsevier (HESI). Your nursing program chooses which HESI A2 sections you take. Poker Exams HESI A2 Chemistry Exams practice is not the live Elsevier exam.
How Chemistry fits HESI A2
HESI A2 is modular. Confirm required sections, time limits, and calculator rules with your school before you test.
- Reading Comprehension, 50 scored · about 60 minutes
- Vocabulary, 50 scored · about 50 minutes
- Grammar, 50 scored · about 50 minutes
- Basic Math, 50 scored · about 50 minutes
- Anatomy and Physiology, 25 scored · about 25 minutes
- Biology, 25 scored · about 25 minutes
- Chemistry, 25 scored · about 25 minutes (you are here)
Chemistry domains
Calculations are light compared to a full college course. Understanding language and trends matters more.
High-yield Chemistry topics
Concepts
- Periodic trends for size and electronegativity
- Balancing simple equations conceptually
- Molarity vocabulary without heavy lab math
Clinical links
- Acid-base balance language at intro level
- Isotonic vs. hypotonic vs. hypertonic solutions
- Common ion names you will see in charts
Lab safety language
- Flammable vs. corrosive vs. oxidizer labels
- pH scale direction and neutral point
- Solute, solvent, and saturation vocabulary
On test day
Use the periodic table if your center provides one on screen or paper.
- About 25 scored items in 25 minutes.
- Eliminate answers that violate basic charge or bonding rules.
Strategies for HESI Chemistry
- Label ions and charges before balancing.
- Connect pH to H+ concentration directionally, even without a calculator.
- Read units on every numeric stem.
Mistakes on HESI Chemistry prep
- Trying to master organic mechanisms
- Memorizing the periodic table without trends
- Skipping acid-base vocabulary
Two-week Chemistry plan
Week 1: Atoms, bonding, and periodic trends.
Week 2: Solutions, acids, and bases.
Week 2: 25-minute Chemistry timed sets using the 3 HESI A2 Chemistry Exams quizzes on this page (102 practice questions) ; review every missed rationale the same day.
HESI A2: Chemistry practice
3 quizzes for the HESI A2 Chemistry Exams subject on this course (102 questions). Use them to rehearse Chemistry content before you sit the official exam, not as a substitute for ATI registration or policies.
HESI A2 Chemistry: frequently asked questions
- Is a full semester of Chemistry required?
- Many schools require prerequisites, but the HESI section itself stays introductory.
- Are calculators allowed on HESI Chemistry?
- Follow your testing center. Basic Math policy does not always apply to science sections.