Question

(Cr³+(aq) + 2Cl⁻(aq) rightarrow Cr(s) + Cl₂(g) + 3e⁻)

What is the final, balanced equation for this reaction?


A) (2Cr³+(aq) + 6Cl⁻(aq) rightarrow 2Cr(s) + 3Cl₂(g) + 6e⁻)
B) (Cr³+(aq) + 3Cl⁻(aq) rightarrow Cr(s) + 1.5Cl₂(g) + 3e⁻)
C) (2Cr³+(aq) + 6Cl⁻(aq) rightarrow 2Cr(s) + Cl₂(g) + 6e⁻)
D) (Cr³+(aq) + 2Cl⁻(aq) rightarrow Cr(s) + 0.5Cl₂(g) + 3e⁻)

Answer 1

Option A is the correct final balanced equation for the reaction given, where the chromium and chlorine atoms as well as the charges are balanced.

Step-by-step explanation:

The student asked for the final, balanced equation for the reaction Cr³+(aq) + 2Cl⁻(aq) → Cr(s) + Cl₂(g) + 3e⁻. After reviewing the provided reactions, it's clear that in order to balance the given half-reaction, both sides must have the same number of atoms and charges. Among the listed choices, the correct balanced equation is (2Cr³+(aq) + 6Cl⁻(aq) → 2Cr(s) + 3Cl₂(g) + 6e⁻), which corresponds to option A.