Question

question 21 of 30 which would most likely be reduced when combined with zn(s)? click for a reduction potential chart a. ni b. fe²⁺ c. al³⁺ d. k⁺

Explanation:

Step1: Recall reduction - potential concept

The species with the highest reduction - potential will be most likely to be reduced when combined with a reducing agent. Zinc ($Zn$) is a reducing agent.

Step2: Check reduction - potential values

From the reduction - potential chart (not shown here but based on general knowledge), the reduction potentials are as follows:
The reduction potential of $Zn^{2 + }/Zn$ is approximately - 0.76 V.
The reduction potential of $Ni^{2+}/Ni$ is approximately - 0.23 V.
The reduction potential of $Fe^{2 + }/Fe$ is approximately - 0.44 V.
The reduction potential of $Al^{3+}/Al$ is approximately - 1.66 V.
The reduction potential of $K^{+}/K$ is approximately - 2.93 V.

Step3: Compare reduction - potential values

Since $Ni^{2+}$ has the highest reduction - potential among the given options compared to the others relative to the reduction potential of $Zn^{2+}/Zn$, nickel ions ($Ni^{2+}$) are most likely to be reduced by $Zn$. Nickel metal ($Ni$) in its elemental form is not in a state to be reduced further among these options.

Answer:

A. Ni