For each of the following cases, decide whether the pH is less than 7, equal to 7, or greater than 7. (a) Equal volumes of 0.10 M acetic acid, CH_3 CO_2 H, and 0.10 M KOH are mixed. (b) 25 mL of 0.015 M NH_3 is mixed with 12 mL of 0.015 M HCl. (c) 150 mL of 0.20 M HNO_3 is mixed with 75 mL of 0.40 M NaOH. (d) 25 mL of 0.45 M H_2 SO_4 is mixed with 25 mL of 0.90 M NaOH.
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