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Questions
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. In which test tube will the fizzing occur more vigorously, and why?
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. The amount and concentration taken for both acids are the same. In which test tube will the fizzing occur more vigorously, and why?
Solution 1
The fizzing will occur strongly in test tube A, in which hydrochloric acid (HCl) is added. This is because HCl is a stronger acid than CH3COOH and therefore produces hydrogen gas at a faster speed, due to which fizzing occurs.
Solution 2
HCl is a strong acid, whereas acetic acid is a weaker acid. Fizzing occurs because the hydrogen gas evolves by reacting with the acid on the magnesium ribbon. Since HCl is a very strong acid, there is a lot of hydrogen gas liberated from test tube A. Therefore, more fizzing takes place in test tube A.
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