Question

100 mL of 0.04 N HCl aqueous solution is mixed with 100 mL of 0.02 N NaOH solution. The pH of the resulting solution is:

• A. 1.0
• B. 1.7
• C. 2.0
• D. 2.3

Hint:

When mixing an acid and a base, the pH of the resulting solution depends on the remaining concentration of H\(^+\) or OH\(^-\) after neutralization. The pH can be calculated using the formula: \[ \text{pH} = \log [\text{H}^+]. \]