# Chapter 15 - Additional Aqueous Equilibria - Questions for Review and Thought - Applying Concepts - Page 693f: 111a

$Box$ $number$ $III$. $(C)$

#### Work Step by Step

- Strong acid solution: high $H_3O^+$ concentration. - And since a small volume of titrant $(NaOH)$ has been added to the solution, the hydronium ion concentration should still be very high. - Therefore, the correct diagram is the third one.

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