`pK_(4)` values are given for some acids. Which is the strongest acid

Options

A. 2.05
B. 3.12
C. 10.02
D. 1.24

Answer

To determine which acid is the strongest based on the given pK values, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship Between pK and Acid Strength**:
- The pK value is the negative logarithm of the acid dissociation constant (K_a).
- pK = -log(K_a)
- A lower pK value indicates a stronger acid because it corresponds to a higher K_a value.

2. **Identify the Given pK Values**:
- Let's say we have the following pK values for different acids:
- Acid A: pK = 1.24
- Acid B: pK = 3.00
- Acid C: pK = 4.75
- Acid D: pK = 5.10

3. **Compare the pK Values**:
- To find the strongest acid, we need to compare the pK values. The acid with the lowest pK value is the strongest.
- From the values provided:
- Acid A: 1.24 (strongest)
- Acid B: 3.00
- Acid C: 4.75
- Acid D: 5.10

4. **Conclusion**:
- The acid with the lowest pK value is Acid A with a pK of 1.24, making it the strongest acid among the given options.

### Final Answer:
The strongest acid is Acid A with a pK value of 1.24.

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