Notifications
Clear all
Acids, bases and salt
1
Posts
2
Users
0
Likes
408
Views
0
04/09/2021 12:26 pm
Topic starter
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 case, fizzing occurs more vigorously and why?
1 Answer
0
04/09/2021 12:27 pm
Fizzing in the reaction is due to the evolution of hydrogen gas by the action of metal on the acid.
Mg(s) + 2HCl(aq) ➝ MgCl2(aq) + H2(g)
(A) Mg(s) + 2CH3COOH(aq) ➝ (CH3COO)2Mg(aq) + H2(g)
(B) Since hydrochloric acid is a stronger acid than acetic acid, fizzing occurs more readily in tube A than in tube B. Actually hydrogen gas will evolve at more brisk speed in test tube A.