Part III: Fill in the blanks by using the correct words 14. The pH value of an acid is \( \qquad \) than 7 . (greater 15. A solution is said to have \( \qquad \) character when its (basic/acidic) 16. The pH value of a neutral solution is \( \qquad \) at 29 17. The pH of \( 10^{-6} \) is \( \qquad \) than the pH of \( 10^{-4} \mathrm{HCl} \). 18. The pH of water decreases when \( \qquad \) is dissolv 19. The hydrogen ion concentration of a solution witl with \( \mathrm{pH}=6 \). (greater/less) 20. An acid produces \( \qquad \) ions in aqueous solution

Sure, here are the filled-in blanks with the correct words: **14.** The pH value of an acid is **_less_** than 7. **15.** A solution is said to have **_acidic_** character when it's acidic/basic. **16.** The pH value of a neutral solution is **_equal to 7_**. **17.** The pH of \( 10^{-6} \) is **_greater_** than the pH of \( 10^{-4} \) HCl. **18.** The pH of water decreases when **_acid_** is dissolved. **19.** The hydrogen ion concentration of a solution with \( \mathrm{pH}=6 \) is **_greater_**. **20.** An acid produces **_hydrogen_** ions in aqueous solution. --- **Detailed Explanations:** **14.** *The pH value of an acid is **less** than 7.* Acids have pH values below 7, indicating a higher concentration of hydrogen ions (H⁺). **15.** *A solution is said to have **acidic** character when it's acidic/basic.* If the solution is acidic, it has an acidic character; if it's basic, it has a basic character. **16.** *The pH value of a neutral solution is **equal to 7**.* Neutral solutions, like pure water, have a pH of exactly 7. **17.** *The pH of \( 10^{-6} \) is **greater** than the pH of \( 10^{-4} \) HCl.* Calculating pH: - pH of \( 10^{-6} \) is 6 - pH of \( 10^{-4} \) HCl is 4 Thus, 6 > 4. **18.** *The pH of water decreases when **acid** is dissolved.* Adding an acid increases the concentration of hydrogen ions, thereby lowering the pH. **19.** *The hydrogen ion concentration of a solution with \( \mathrm{pH}=6 \) is **greater**.* A lower pH indicates a higher concentration of hydrogen ions compared to neutral water (pH=7). **20.** *An acid produces **hydrogen** ions in aqueous solution.* Acids release hydrogen ions (H⁺) when dissolved in water.