Question

select the correct answer. what reaction is depicted by the given equation: au^{3+} + 3e^{-} → au
a. oxidation
b. reduction
c. combustion
d. replacement
e. neutralization

Explanation:

Step1: Recall redox - reaction concepts

Reduction is the gain of electrons, and oxidation is the loss of electrons.

Step2: Analyze the given equation

In the equation $Au^{3 +}+3e^-\to Au$, the gold ion ($Au^{3 +}$) gains 3 electrons to form neutral gold ($Au$).

Answer:

B. reduction