Final answer:
A salt formed from the neutralization of a strong acid by a strong base, such as NaX from acid HX, results in a neutral solution when dissolved in water, with a pH equal to 7.
Step-by-step explanation:
If acid HX is a strong acid, a salt of NaX (aq) will result in a solution that is neutral when dissolved in water, meaning the pH will be equal to 7. This is because NaX is a salt formed from the neutralization of a strong acid (HX) by a strong base (NaOH). When a strong acid and a strong base react, the hydronium ions (H+) from the acid combine with the hydroxide ions (OH−) from the base to form water (H2O), thus neither acidic nor basic ions dominate in the solution. Since the salt is derived from a strong acid with negligible hydrolysis, the resulting solution of NaX in water should neither increase nor decrease the concentration of hydronium ions significantly, and the pH will remain close to 7, which is neutral.