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HESI A2 Exam Prep 2026

Real HESI A2 Questions.
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Practice with exam-accurate HESI A2 questions that match the real test in format, difficulty, and logic. Trusted by students accepted into nursing programs across the United States.

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8
Exam Sections
75%
Typical Pass Score
~5hr
Total Test Time
95%
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About Solutions & Concentrations (Molarity, Dilution)

Learn how to calculate molarity using mass, molar mass, and volume. Step-by-step NaOH example for HESI A2 Chemistry prep.

Related Topics

Atomic StructurePeriodic Table & Periodic TrendsChemical Bonds (Ionic, Covalent, Metallic)Chemical Reactions & Balancing EquationsStoichiometry & Mole Concept
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Solutions & Concentrations (Molarity, Dilution) HESI A2 Practice Questions

Free Solutions & Concentrations (Molarity, Dilution) practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

What is the molarity of a solution prepared by dissolving 20.0 grams of NaOH (molar mass = 40 g/mol) in 500 mL of solution?
1.00 M
2.00 M
4.00 M
0.25 M