Final answer:
Vinegar and soda will react to form a salt, as vinegar contains acetic acid and soda is sodium bicarbonate, a base. Their reaction is a typical neutralization that produces a salt and water.
Step-by-step explanation:
Amongst the given substances, the combination that will create a salt when combined is vinegar and soda. Vinegar is an acetic acid solution, and baking soda is a common name for sodium bicarbonate, which is a base. When these two substances react, they undergo a neutralization reaction, producing sodium acetate (the salt) and water, along with carbon dioxide gas. This is representative of the general chemical reaction where an acid reacts with a base to form a salt and water, like the example where sulfuric acid (H₂SO₄) reacts with zinc (Zn) to form zinc sulfate (ZnSO₄) and hydrogen gas (H₂).