Question

question 12 1 pts the addition of hydrochloric acid (hcl) to an aqueous solution will ___________ the concentration of hydrogen ions (h+) and ___________ the ph of the solution. increase, keep the same increase, increase decrease, increase decrease, decrease keep the same, increase increase, decrease

Explanation:

Step1: Understand HCl property

HCl is a strong acid that dissociates completely in water to produce hydrogen ions ($H^+$). So adding HCl will increase the concentration of $H^+$ ions in the solution.

Step2: Recall pH - $H^+$ relationship

The pH is defined as $pH = -\log[H^+]$. As the concentration of $H^+$ ions $[H^+]$ increases, the value of $-\log[H^+]$ (i.e., pH) decreases.

Answer:

O. increase, decrease