Balance each redox reaction using the half-reaction method. Express your answer as a chemical equation. Identify all of the phases. [Solved]

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1.) Zn(s) Sn2 (aq)Zn2 (aq) Sn(s)

(*) This reaction will not occur since aluminum metal is always covered with a layer of aluminum oxide (Al2O3). Often chloride ion (Cl-) is used to remove the oxide layer since it forms [AlCl4]^-, but in the presence of chloride ion (or some other halide) silver ion will precipitate (AgCl).

1.) Zn(s) Sn2 (aq) > Zn2 (aq) Sn(s)
Balanced as written. It is intuitively obvious since the charges on Zn2 and Sn2 are the same.

2.) Mg(s) Cr3 (aq)Mg2 (aq) Cr(s)
3(Mg > Mg2 2e-)
2(Cr3 3e- > Cr)
– –
3Mg 2Cr3 > 3Mg2 2Cr

3.) Al(s) Ag (aq) > Al3 (aq) Ag(s) (*)
Al > Al3 3e-
3(Ag 1e- > Ag)
–
Al 3Ag > Al3 3Ag

(*) This reaction will not occur since aluminum metal is always covered with a layer of aluminum oxide (Al2O3). Often chloride ion (Cl-) is used to remove the oxide layer since it forms [AlCl4]^-, but in the presence of chloride ion (or some other halide) silver ion will precipitate (AgCl).

This post is last updated on hrtanswers.com at Date : 1st of September – 2022

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