Question

For a saturated NaCl solution, what effect will adding concentrated HNO₃ have on the system?

Select one:

a. No effect

b. Shift left

c. Shift right

Answer 1

Saturated NaCl solution will always have below equilibrium:

NaCl(s) <----> Na+(aq) + Cl-(aq)

Now if you add concentrated HNO3 to this equilibrium, then no effect on the equilibrium should be observed.

Because HNO3 completely dissociates to give H+ and NO3- ions, but none of these ions are common ion with NaCl ions. Hence, there will be no effect on the equilibrium.

Thus the answer is option a) No effect.