To determine the type of each solution based on its pH level and the given results, let’s analyze them step by step:
### Analyzing each pH level:
1. Solution A: pH = 1
2. Solution B: pH = 5
3. Solution C: pH = 7
4. Solution D: pH = 9
5. Solution E: pH = 14
### Classification criteria:
- Strong alkali: pH ≥ 12
- Strong acid: pH ≤ 2
- Weak acid: 3 ≤ pH ≤ 6
- Neutral solution: pH = 7
- Weak base: 8 ≤ pH ≤ 11
### Step-by-step solution:
(i) Which solution was a strong alkali?
- pH of 14 is considered a strong alkali.
- Therefore, Solution E is a strong alkali.
(ii) Which solution was a strong acid?
- pH of 1 is considered a strong acid.
- Therefore, Solution A is a strong acid.
(iii) Which solution was a weak acid?
- pH of 5 is considered a weak acid.
- Therefore, Solution B is a weak acid.
(iv) Which solution was a neutral solution?
- pH of 7 is considered neutral.
- Therefore, Solution C is a neutral solution.
(v) Which solution was a weak base?
- pH of 9 is considered a weak base.
- Therefore, Solution D is a weak base.
### Results:
So, the classification of the solutions is as follows:
- Strong alkali: Solution E
- Strong acid: Solution A
- Weak acid: Solution B
- Neutral solution: Solution C
- Weak base: Solution D
