Answer:
Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq) is an oxidation -reduction reaction
Explanation:
An oxidation-reduction reaction is a chemical reaction that involves a transfer of electrons between two atoms, molecles,.. It is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
⇒The oxidation state of an individual atom is 0.
⇒The total oxidation state of all atoms in: a neutral species is 0 and in an ion is equal to the ion charge.
⇒Group 1 metals have an oxidation state of +1 and Group 2 an oxidation state of +2
⇒Hydrogen generally has an oxidation state of +1 in compounds
⇒Oxygen generally has an oxidation state of -2 in compounds
H2CO3 (aq) + Ca(NO3)2 (aq) → 2HNO3 (aq) + CaCO3 (s)
Carbon on the left has an oxidation state of -4, on the right it has also oxidation state -4
Nitrogen has on the left an oxidation state of +5, on the right it has also an oxidation state of +5
Calcium has on the left an oxidation state of +2, on the right also an oxidation state of +2
⇒ There is no change of oxidation number so this is NOT a redox reaction
AgNO3 (aq) + HCl (aq) → AgCl (s) + HNO3
Silver (Ag) on the left has an oxidation state of +1, on the right it has also oxidation state +1
Nitrogen has on the left an oxidation state of +5, on the right it has also an oxidation state of +5
Cl has on the left an oxidation state of -1, on the right it has also an oxidation state of -1
⇒ There is no change of oxidation number so this is NOT a redox reaction
Ba(C2H3O2)2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaC2H3O2(aq)
Na has on the left an oxidation state of +1, on the right it has also an oxidation state of +1
Ba has on the left an oxidation state of +2, on the right it has also an oxidation state of +2
S has on the left an oxidation state of +6, on the right it has also an oxidation state of +6
⇒ There is no change of oxidation number so this is NOT a redox reaction
Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq)
Cu has on the left an oxidation state of 0, on the right it has an oxidation state of +2
Ag has on the left an oxidation state of +1, on the right it has also an oxidation state of 0
⇒ There is a change of oxidation number so this is a redox reaction
Oxidizing agent: Ag in AgNO3
; Reducing agent: Cu
HCl (aq) + NaOH (aq) → H2O (l) + NaCl (aq)
Na has on the left an oxidation state of +1, on the right it has also an oxidation state of +1
Cl has on the left an oxidation state of -1, on the right it has also an oxidation state of -1
Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq) is an oxidation -reduction reaction
