Import Question JSON

$\text{In this problem, we are adding a strong base NaOH to a strong acid (HCl) and observing the change in pH.}$ $1. \text{ Initially, the solution is acidic because it contains } 0.1 \text{ M HCl, which gives a low pH.}$ $2. \text{ As NaOH is added, it starts to neutralize the HCl. Since both NaOH and HCl are strong, they completely dissociate, leading to a sharp increase in pH as the equivalence point (where moles of HCl equal moles of NaOH) is approached.}$ $3. \text{ At the equivalence point, the pH will be around 7 because we are neutralizing a strong acid with a strong base.}$ $4. \text{ After the equivalence point, any further addition of NaOH will make the solution basic, causing the pH to increase further.}$ $\text{Therefore, the graph that correctly depicts the change in pH should show:}$ $- \text{A starting low pH.}$ $- \text{A steep rise as it approaches pH 7.}$ $- \text{A leveling off after passing pH 7 as it becomes basic.}$ $\text{The correct answer is graph 2, which shows an initial low pH, a steep rise at the equivalence point, and a leveling off afterward.}$