Question

Why should a magnesium ribbon be cleaned before burning in air ?
If any of the following reactions occur spontaneously, write
the balanced net ionic equation. If not, write “no reaction."
(a) Pb + Zn2+ = Pb2+ + Zn
(6) Fe +H+ = Fe2+ + H,
(c) Cu+ Agt → Cu2+ + Ag
(d) Cr + Zn2+ = Cr3+ + Zn
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Answer 1

Answer:

A magnesium ribbon is cleaned to remove the protective layer of basic magnesium carbonate form its surface so that its may readily combine with the oxygen of air