Question

What is (aq),(I), and (g) mean in H2O2(aq) -> H2O(l) + O2(g) and why is it nesesary to have (aq),(I), and (g)

Answer 1

Step-by-step explanation:

A matter can be present in different states like solid, liquid or gas. When we write a chemical equation then states of species involved are also mentioned.

This is because it tells in what state the reactants were present and in what state the products are then formed.

For example,
`H_(2)O_(2)(aq) \rightarrow H_(2)O(l) + O_(2)(g)`

Now here, (aq) means aqueous, (l) means liquid and (g) means gas.

So, these states denoted are necessary as it tells that
`H_(2)O_(2)` in aqueous state dissociates to give
`H_(2)O` in liquid state and
`O_(2)` in gaseous state.