Refer to the following titration curve below: 13 12 11 10 9 7 4 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Volume of Titrant / mL - Unknown Acid 0.10 mol/L – titrant = NaOH 0.1 mol/L At ph 10.0, which form of histidine is most abundant? His2+ His Hisº His+

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