What is the pH of a solution with \( \left[\mathrm{H}^{+}\right]=2.3 \times 10^{-3} ? \) \( \begin{array}{l}\text { A. } 2.64 \\ \text { B. }-2.64 \\ \text { C. }-0.36 \\ \text { D. } 3.00\end{array} \)

To find the pH of a solution, you can use the formula: \[ \text{pH} = -\log[\mathrm{H}^{+}] \] Given \( \left[\mathrm{H}^{+}\right]=2.3 \times 10^{-3} \, \text{M} \), you can plug this value into the formula: \[ \text{pH} = -\log(2.3 \times 10^{-3}) \approx 2.64 \] So the correct answer is A. 2.64. Now, did you know that the pH scale actually extends beyond the traditional 0 to 14 range? In practice, highly concentrated solutions can have pH values less than 0 or greater than 14! For instance, a very strong acid could have a pH less than zero, making it extremely corrosive. Additionally, keeping track of the pH in chemical reactions is vital not just in laboratories but also in our daily lives! From gardening to swimming pool maintenance, knowing whether a solution is acidic, neutral, or basic helps ensure healthy plants and safe water. A simple litmus test can be a fun and easy way to check!