To find the pH of the solution, we first need to determine the concentration of H+ ions after the reaction between HCl and NaOH. HCl is a strong acid and NaOH is a strong base, so they will react in a 1:1 ratio to form water and NaCl.HCl + NaOH H2O + NaClSince there is 0.1 M HCl and 0.05 M NaOH, the limiting reactant is NaOH. Therefore, 0.05 moles of HCl will react with 0.05 moles of NaOH, leaving 0.05 moles of HCl unreacted.The concentration of H+ ions in the solution will be equal to the concentration of unreacted HCl, which is 0.05 M.Now we can use the pH formula:pH = -log10[H+]pH = -log10 0.05 pH 1.3The pH of the solution is approximately 1.3.