the reaction of metals with nitric acid are more complex due to the _______.
________________________
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Answer:
Reactions with metals
Dilute nitric acid behaves as a typical acid in its reaction with most metals. Magnesium, manganese, and zinc liberate H2: Mg + 2 HNO3 → Mg(NO3)2 + H2 (Magnesium nitrate) Mn + 2 HNO3 → Mn(NO3)2 + H2 (Manganese(II) nitrate)
Answer:
(A) Nitric acid being strong oxidizing agent, oxidizes the H
2
produced to water and itself gets reduced to any nitrogen oxide (N
2
O,NO,NO
2
).
But when magnesium and manganese react with the very dilute HNO
3
,H
2
gas is evolved. Mg and Mn are highly reactive metals, they are able to displace hydrogen from the nitric acid.
Mg+2HNO
3
⟶Mg(NO
3
)
2
+H
2
(B) The reaction of nitric acid with zinc involves a complicated set of redox reactions.
4Zn+10HNO
3
⟶4Zn(NO
3
)
2
+N
2
O+5H
2
O
(C) Tin reacts with nitric acid to produce tin(II) nitrate, ammonium nitrate, and water.
4Sn+10HNO
3
⟶4Sn(NO
3
)
2
+NH
4
NO
3
+3H
2
O
(D) 3Pb+8HNO
3
(dil.)
⟶3Pb(NO
3
)
2
+4H
2
O+2NO