39. A student makes a solution that simulates stomach acid. Which of the following would be true of this solution, compared to distilled water?
Answer: B
This solution has more hydrogen ions compared to distilled water.
The solution that simulates stomach acid contains a higher concentration of hydrogen ions than distilled water, which is neutral with a pH of 7. Stomach acid, primarily composed of hydrochloric acid, has a much lower pH, indicating a higher acidity and thus more hydrogen ions.
A) It has a higher pH.
This option is incorrect because stomach acid has a lower pH than distilled water. A higher pH would indicate a more basic solution, which contradicts the acidity characteristic of stomach acid.
B) It has more hydrogen ions.
This option is correct as the solution mimicking stomach acid contains significantly more hydrogen ions than distilled water. The presence of these ions is what contributes to the acidic nature of the solution, lowering its pH.
C) It contains more hydroxyl ions.
This option is incorrect since an acidic solution, such as one simulating stomach acid, has fewer hydroxyl ions compared to distilled water. The increase in hydrogen ions leads to a decrease in hydroxyl ions, as they are inversely related in a solution.
D) It has more hydroxyl ions.
This option is also incorrect. A solution that simulates stomach acid would not have more hydroxyl ions than distilled water, as the acidity implies a greater concentration of hydrogen ions and a corresponding decrease in hydroxyl ions.
Conclusion
The correct answer is B, as the solution simulating stomach acid contains more hydrogen ions than distilled water, making it more acidic. All other options incorrectly suggest a higher pH or a greater concentration of hydroxyl ions, which does not align with the properties of an acidic solution.