Cl – is the conjugate base of — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

# Conjugate Base of $Cl^-$ **Definition:** A conjugate base is formed when an acid donates a proton ($H^+$). $$\text{Acid} \rightarrow \text{Conjugate Base} + H^+$$ **Finding the acid:** If $Cl^-$ is the conjugate base, we need to identify what acid it came from by adding back one proton: $$Cl^- + H^+ \rightarrow HCl$$ **Answer:** $Cl^-$ is the conjugate base of **$HCl$ (hydrochloric acid)**. When $HCl$ donates a proton, it leaves behind $Cl^-$: $$HCl \rightarrow Cl^- + H^+$$