Suppose 50.0 mL of a 0.100 M solution of the weak acid HA is titrated with a 0.100 M solution of NaOH.Which diagram best represents the equilibrium composition of the solution at point X on the titration curve below? (Solvent water molecules are omitted for clarity.) 
Definitions:
Fontanelles
Soft spots on a baby's skull where the bones have not yet fused together, allowing for easier birth and brain growth.
Neonate's Skull
Describes the characteristics and conditions of a newborn baby's skull, which is notably soft and flexible due to fontanelles.
Bones
The rigid organs that form part of the endoskeleton of vertebrates, providing support, protection, and aiding in movement.
Fused
Combined or blended to form a single entity.
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