# Problem: Consider the titration of 15.0 mL of 0.200 M H 3PO4(aq) with 0.200 M NaOH(aq). What is/are the major species in solution after the addition of 15.0 mL of base? 1. H3PO4(aq) and H2PO4− (aq) 2. H2PO4− (aq) and HPO4− (aq) 3. PO43− (aq) 4. H2PO4− (aq)

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Consider the titration of 15.0 mL of 0.200 M H 3PO4(aq) with 0.200 M NaOH(aq). What is/are the major species in solution after the addition of 15.0 mL of base?

1. H3PO4(aq) and H2PO4 (aq)

2. H2PO4 (aq) and HPO4 (aq)

3. PO43− (aq)

4. H2PO4 (aq)

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Based on our data, we think this problem is relevant for Professor Wloch's class at OAKLAND.