Find the correct order of acid strength of the following acids in aqueous solution

Options

A. `HCIO_(4) gt H_(2)SO_(4) gt HCI gt HNO_(3)`
B. `HCIO_(4) gt H_(2)SO_(4) gtHNO_(3)gt HCI`
C. `HCIO_(4) = H_(2)SO_(4) =HCI = HNO_(3)`
D. `HCIO_(4) gt HCI gt H_(2)SO_(4) gt HNO_(3)`

Answer

To determine the correct order of acid strength of the given acids in aqueous solution, we will analyze the acids based on their ability to dissociate in water and the leveling effect of water.

### Step-by-Step Solution:

1. **Identify the Acids**: The acids we need to analyze are:
- HClO4 (Perchloric acid)
- H2SO4 (Sulfuric acid)
- HCl (Hydrochloric acid)
- HNO3 (Nitric acid)

2. **Understand the Leveling Effect**: The leveling effect of water states that in aqueous solution, strong acids will dissociate completely to produce hydronium ions (H3O+). Therefore, any acid stronger than H3O+ will behave similarly in terms of strength because they will all produce the same concentration of H3O+.

3. **Dissociation of Each Acid**:
- **HClO4**: Dissociates to ClO4- + H3O+
- **H2SO4**: Dissociates to SO4^2- + 2H3O+ (it is a diprotic acid, meaning it can donate two protons)
- **HCl**: Dissociates to Cl- + H3O+
- **HNO3**: Dissociates to NO3- + H3O+

4. **Compare Acid Strength**: All these acids are considered strong acids and will dissociate completely in water. However, H2SO4 is particularly strong because it can donate two protons, making it stronger than the others in terms of the amount of H3O+ produced.

5. **Conclusion on Acid Strength**:
- H2SO4 is the strongest acid due to its ability to donate two protons.
- HClO4, HCl, and HNO3 are strong acids but they behave similarly in terms of dissociation in water.
- Therefore, the order of strength in aqueous solution is:
- H2SO4 > HClO4 = HCl = HNO3

### Final Order of Acid Strength:
**H2SO4 > HClO4 = HCl = HNO3**