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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About Chemical Reactions & Balancing Equations

Learn how to identify a double replacement reaction with this HESI A2 Chemistry example involving K₂SO₄ and BaCl₂. Includes balanced equation and explanation.

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Chemical Reactions & Balancing Equations HESI A2 Practice Questions

Free Chemical Reactions & Balancing Equations practice questions for the HESI A2 exam with detailed rationales.

Question 1 of 2

Which of the following provides an example of a double replacement reaction?
K₂SO₄ + BaCl₂ → 2 KCl + BaSO₄
Mg + CuCl₂ → MgCl₂ + Cu
2 NaOH → Na₂O + H₂O
C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O