# H_2SO_3 (aq) -> H_2O (l) + SO_2 (g) is what type of reaction?

Mar 29, 2018

I'd say decomposition reaction.

#### Explanation:

In a decomposition reaction, a substance splits into smaller molecules.

So here, we got the reaction:

${H}_{2} S {O}_{3} \left(a q\right) \to {H}_{2} O \left(l\right) + S {O}_{2} \left(g\right)$

And so, the bigger molecule $\left({H}_{2} S {O}_{3}\right)$ is split into two smaller molecules, water $\left({H}_{2} O\right)$ and sulfur dioxide $\left(S {O}_{2}\right)$.