Assertion : On adding H2SO4 to water the resulting aqueous solution g...
Because H2SO4 is a strong acid, it readily forms hydronium ions when dissolved in water which are responsible for its corrosive action.
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Assertion : On adding H2SO4 to water the resulting aqueous solution g...
Assertion: On adding H2SO4 to water, the resulting aqueous solution gets corrosive.
Reason: Hydronium ions are responsible for corrosive action.
The correct answer is option 'A' - Both assertion (A) and reason (R) are true, and reason (R) is the correct explanation of assertion (A).
Explanation:
Corrosiveness of H2SO4:
- H2SO4 is a strong acid that dissociates completely in water to form H+ ions and SO4^2- ions.
- The H+ ions combine with water molecules to form hydronium ions (H3O+), which are responsible for the acidic properties of the solution.
- Hydronium ions have a high reactivity and can cause corrosion of metals and other materials.
Reasoning:
- When H2SO4 is added to water, it dissociates into H+ ions and SO4^2- ions.
- The H+ ions react with water to form hydronium ions (H3O+).
- The hydronium ions are responsible for the corrosive action of the resulting solution.
- The high reactivity of hydronium ions enables them to attack and corrode metals, as well as other materials.
Conclusion:
- The assertion that adding H2SO4 to water results in a corrosive solution is true.
- The reason for this corrosive action is the presence of hydronium ions, which are formed when H2SO4 dissociates in water.
- Therefore, the reason provided is a correct explanation for the assertion.
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