For each of the following cases, decide whether the pH is less than 7, equal to 7, or greater than 7. Equal volumes of 0.45 M acetic acid, , and 0.45 M are mixed. The pH is . 25 mL of 13 M is mixed with 13 mL of 0.026 M . The pH is . 100 mL of 0.10 M is mixed with 50 mL of 0.20 M . The pH is . 48 mL of 0.20 M is mixed with 48 mL of 0.40 M .