Question

question 26
1 pts
which of the following is an oxidation half - reaction?
\text{sn}^{4 + }+2e^-
ightarrow\text{sn}^{2 + }
\text{fe}^{2 + }
ightarrow\text{fe}^{3 + }+e^-
\text{cl}_2 + 2e^-
ightarrow2\text{cl}^-
\text{o}_2 + 4\text{h}^++4e^-
ightarrow2\text{h}_2\text{o}

question 27
1 pts
which of the following is a reduction half - reaction?
\text{zn}
ightarrow\text{zn}^{2 + }+2e^-
2\text{h}^++2e^-
ightarrow\text{h}_2
\text{na}
ightarrow\text{na}^++e^-
\text{h}_2\text{s}+2\text{h}_2\text{o}
ightarrow\text{so}_2 + 4\text{h}^++2e^-

Explanation:

Oxidation half - reactions involve the loss of electrons by a species, while reduction half - reactions involve the gain of electrons by a species. In Question 26, we need to identify the oxidation half - reaction among the options. In Question 27, we need to identify the reduction half - reaction. Oxidation is an increase in oxidation state and loss of electrons, and reduction is a decrease in oxidation state and gain of electrons.

Answer:

Question 26: Please provide the options clearly as they are not legible.
Question 27: Please provide the options clearly as they are not legible.