The values of dissociation constants of some acids ( at `25^(@) C` are as follows. Indicate which is the strongest acid in water

Options

A. `1.4 xx 10^(-2)`
B. `1.6 xx 10^(-4)`
C. `4.4 xx 10^(-10)`
D. `4.3 xx 10^(-7)`

Answer

To determine which acid is the strongest in water based on their dissociation constants (Ka), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Acid Strength**: The strength of an acid in water is determined by its ability to dissociate and produce hydrogen ions (H⁺). The more H⁺ ions produced, the stronger the acid.

2. **Identify the Dissociation Constants (Ka)**: We need to look at the given dissociation constants (Ka) for the acids. The larger the value of Ka, the stronger the acid.

3. **Compare the Ka Values**: The provided Ka values are:
- Acid 1: \(10^{-2}\)
- Acid 2: \(10^{-4}\)
- Acid 3: \(10^{-10}\)
- Acid 4: \(10^{-7}\)

4. **Determine the Maximum Ka**: Among the given values, \(10^{-2}\) is the largest. This indicates that Acid 1 has the highest tendency to dissociate and produce H⁺ ions.

5. **Conclusion**: Since Acid 1 has the highest Ka value, it is the strongest acid in water.

### Final Answer:
The strongest acid in water is the one with the dissociation constant \(10^{-2}\).

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