Question

1. choose the best answer.

which type of reaction is this?
$\ce{cl_{2}(g) + 2fe(aq) -> 2cl^{-} + 2fe^{3+}}$

• redox
• acid - base
• precipitation

1. choose the best answer.

____ is the process in which an atom or ion experiences an increase in oxidation state.

• oxidation
• reducing
• oxidizing
• reduction

Explanation:

Question 11

Step1: Analyze reaction type

A redox reaction involves electron transfer (change in oxidation states). In $\ce{Cl2(g) + 2Fe^{2+}(aq) -> 2Cl^- + 2Fe^{3+}}$ (note: likely a typo, $\ce{Fe}$ should be $\ce{Fe^{2+}}$), $\ce{Cl}$ in $\ce{Cl2}$ (oxidation state 0) becomes $\ce{Cl^-}$ (oxidation state -1, gain electrons, reduction). $\ce{Fe^{2+}}$ (oxidation state +2) becomes $\ce{Fe^{3+}}$ (oxidation state +3, lose electrons, oxidation). Acid - base reactions involve proton transfer, precipitation involves insoluble solid formation. This has oxidation state changes, so it's redox.

Oxidation is defined as the process where an atom or ion's oxidation state increases (loses electrons). Reducing is a property of a substance, oxidizing is a property of a substance that causes oxidation, and reduction is a decrease in oxidation state.

Answer:

A. redox

Question 12