If aqueous hydrofluoric acid is reacted with
sodium hydroxide, which of the following sub-
stances are in the net ionic equation?
1. fluoride ion, hydronium ion, and water
2. hydrofluoric acid, sodium ion, hydroxide
ion, and fluoride ion
3. hydrofluoric acid, hydroxide ion, hydro-
nium ion, fluoride ion, and water
4. hydrofluoric acid, hydroxide ion, fluoride
ion, and water
5. fluoride ion, hydroxide ion, hydronium
ion, and water
It's 4, not 3
To determine the substances in the net ionic equation, we need to first write the balanced chemical equation for the reaction between aqueous hydrofluoric acid (HF) and sodium hydroxide (NaOH).
The balanced chemical equation for the reaction is as follows:
HF(aq) + NaOH(aq) -> NaF(aq) + H2O(l)
Now, let's break down the equation into its ionic form to identify the ions present in the reaction.
HF(aq) + NaOH(aq) -> Na+(aq) + F-(aq) + H2O(l)
From the above equation, we can see that the only ions that are directly involved in a chemical reaction are the fluoride ion (F-) and the sodium ion (Na+). Therefore, the correct answer is option 2, which includes hydrofluoric acid, sodium ion, hydroxide ion, and fluoride ion.