Question

identify the type of reaction occurring based on the description below:
\sodium hydroxide reacts with iron (iii) chloride.\
what type of reaction is this?
a double - replacement
b synthesis
c decomposition
d combustion reaction
e single - replacement

Explanation:

A double - replacement reaction involves the exchange of ions between two compounds. In the reaction of sodium hydroxide ($NaOH$) and iron(III) chloride ($FeCl_3$), the sodium ($Na^+$) and iron ($Fe^{3 + }$) ions exchange their anions (hydroxide $OH^-$ and chloride $Cl^-$). The general form of a double - replacement reaction is $AB+CD
ightarrow AD + CB$. Here, $NaOH$ ($AB$ where $A = Na^+$, $B=OH^-$) and $FeCl_3$ ($CD$ where $C = Fe^{3+}$, $D = Cl^-$) react to form $NaCl$ ($AD$) and $Fe(OH)_3$ ($CB$).

Answer:

A. Double - replacement