Which of the following is a redox reaction?

KCI_(aq) + H₂SO_4(aq) → KHSO_4(aq) + HCI_(aq)

2FeBr_2(aq) + Br_4(aq) → 2FeBr_3(aq)

3AgNO_(aq) + FeCl_3(aq) → 3AgCl_(aq) + Fe(NO₃)_3(aq)

H₂CO_3(aq) → H₂O_(I)2- + CO_2(g)

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Wawaaaaaaaaaaaqa

2 years ago

to easily know a redox reaction, find an element that did not combine with anything in the reactant side and find if that element combines with another thing in the product vice versa . if it does, it is a redox reaction .
Br4 was single in the reactant and it combined with 2Fe in the product.

KyrianChibuike

3 years ago

Explanation plz

King33Victor

3 months ago

BR4 was reduced to FeBr4
that shows redox doing

Marymatics

2 years ago

since iron's valency is +2 and bromine with a reactive valency 1 since it non metal and reacting with a metal it will be -1. (2FeBr2(aq) + Br4(aq) )Br4(aq) o.
→ 2FeBr3(aq).
2×y+-1×2×3=0
2y-6=0
y=+3
so 2FeBr2(aq) + Br4(aq) → 2FeBr3(aq) is a redox reaction.