Question

question 8 (5 points)
listen
can solid febr₂ react with cl₂ gas to produce solid fecl₂ and br₂ gas? why or why not?
a) no, because cl₂ has lower activity than br₂
b) yes, because cl₂ has higher activity than br₂
c) yes, because cl₂ has lower activity than br₂
d) no, because cl₂ and br₂ have the same activity

Explanation:

To determine if the reaction occurs, we use the activity series of halogens. Chlorine ($\ce{Cl2}$) is more reactive (has higher activity) than bromine ($\ce{Br2}$). In a single - replacement reaction, a more reactive halogen can displace a less reactive halogen from its compound. So, $\ce{Cl2}$ can displace $\ce{Br^-}$ from $\ce{FeBr2}$. Let's analyze each option:

• Option A: $\ce{Cl2}$ is more active than $\ce{Br2}$, so this is incorrect.
• Option B: Since $\ce{Cl2}$ has higher activity than $\ce{Br2}$, it can displace $\ce{Br^-}$ from $\ce{FeBr2}$ to form $\ce{FeCl2}$ and $\ce{Br2}$, so this is correct.
• Option C: $\ce{Cl2}$ is more active than $\ce{Br2}$, not less, so this is incorrect.
• Option D: $\ce{Cl2}$ and $\ce{Br2}$ do not have the same activity, $\ce{Cl2}$ is more active, so this is incorrect.

Answer:

B) Yes, because $\ce{Cl2}$ has higher activity than $\ce{Br2}$