A beaker contains 100 mL of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the results of this mixing?

Question

Quizplus · Accepted Answer

When NaOH and HCl are mixed, they undergo a neutralization reaction to form NaCl and H2O. The reaction can be represented as follows:
NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l)
Since HCl is a strong acid, when it is added to the solution of NaOH (a strong base), it will completely neutralize the NaOH. The pH of the beaker's contents will decrease because H+ ions will be produced. Thus, the correct statement is E. The concentration of Na+ ion will not rise significantly since NaOH is a strong base and its dissociation is complete. Similarly, the concentration of Cl- ion will not be 0.1 M, but it will be the same as the concentration of Na+ ion, which is 1 M. The concentration of undissociated H2O molecules will remain unchanged since they are not involved in the reaction.

A Beaker Contains 100 ML of NaOH Solution at PH