Consider the following statements :<br><br>While diluting concentrated nitric acid solution<br>1. the concentration of [H_3O^+] ions/volume increases<br>2. water must be added slowly to concentrated acid<br>3. acid must be added slowly to water<br><br>Which of the statements given above is/are <strong>CORRECT</strong>?
- A. 1, 2 and 3
- B. 1 and 2 only
- C. 3 only ✓
- D. 2 and 3 only
Correct Answer: C. 3 only
Explanation
Diluting an acid decreases the concentration of hydronium ions ([H_3O^+]) per unit volume. For safety, acid must always be added slowly to water with constant stirring to safely dissipate the highly exothermic heat.
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