Certainly! Let's address the question step by step.
### Question 1 Analysis
The question states that when two solutions, [tex]\( P \)[/tex] and [tex]\( Q \)[/tex], are mixed, the resulting solution has a pH of 7, which is neutral. This means that the mixture must neither be acidic nor basic after mixing.
To achieve a neutral pH of 7 when mixing two solutions, typically one solution must be acidic and the other must be basic. The acid-base neutralization will ideally bring the overall pH to near 7.
Here is a breakdown of the pH values:
- pH less than 7: Acidic
- pH of 7: Neutral
- pH greater than 7: Basic
We need to identify which pair of solutions, when mixed together, could reasonably result in a neutral solution (pH of 7).
#### Option A: pH of P = 13 and pH of Q = 9
- pH 13 is strongly basic.
- pH 9 is weakly basic.
- Mixing two basic solutions will not yield a neutral pH.
#### Option B: pH of P = 12 and pH of Q = 7
- pH 12 is basic.
- pH 7 is neutral.
- Mixing a basic solution with a neutral solution will yield a basic solution.
#### Option C: pH of P = 14 and pH of Q = 1
- pH 14 is strongly basic.
- pH 1 is strongly acidic.
- A strong base and a strong acid can neutralize each other resulting in a neutral solution.
#### Option D: pH of P = 1 and pH of Q = 6
- pH 1 is strongly acidic.
- pH 6 is weakly acidic.
- Mixing two acidic solutions will not yield a neutral pH.
After analyzing each option, it is clear that:
Correct Answer:
- Option C: pH of P = 14 and pH of Q = 1.
When mixed, a strong acid (pH 1) and a strong base (pH 14) can neutralize each other, resulting in a neutral pH of 7.
