This is a double displacement reaction.
This means the cations will be switched around (or the anions if you prefer).
This means the Na+ ion is switched with the H+ ion.
The final answer will then be
This is an example of a neutralization reaction, which is a subset of double displacement reactions.
A neutralization reaction is when an acid and a base react to form water and salt.
Taking the example problem,
The solution should produce a