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. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?


  • Acetic acid is a weak acid, while HCl is a strong acid.
  • The formation of hydrogen gas as a result of the acid’s reaction with the magnesium ribbon causes fizzing.
  • Since HCl is a strong acid, a lot of hydrogen gas is liberated from test tube A.
  • As a result, more fizzing occurs in test tube A.

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