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Part A. We are being asked to determine the pH of the buffer of 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH.
CH3COOH (weak acid) will react with NaOH (strong base).
CH3COOH(aq) + NaOH(aq)⇌ CH3COO–(aq) + H2O(l)
***Na+ is a neutral ion and has no contribution to pH
Calculate the pH of the following solutions:
Buffer 1: 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH.
Buffer 2: 50.0 mL of 0.18 M NH3 with 5.0 mL of 0.36 M HBr.
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Based on our data, we think this problem is relevant for Professor Ow's class at USC.