The following pictures represent solutions at various stages in the titration of a weak diprotic acid H2A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A2- ions.(K+,H3O+ initially present,OH- initially present and solvent water molecules have been omitted for clarity) . 
-Which picture represents the system halfway between the first and second equivalence points?
Definitions:
Self-Control
The capacity to manage one's feelings, cognitions, and actions when confronted with desires and sudden urges.
Sociodramatic Play
A form of play in which children enact roles and scenarios, involving cooperation and negotiation, to make sense of the world around them.
Extrinsic
Relating to motivation driven by external rewards or outcomes, rather than internal factors.
Practicing
The act of repeatedly performing an activity or skill so as to acquire or maintain proficiency in it.
Q34: As the atomic number of the elements
Q45: The standard reduction potential E° = -0.45
Q62: What is the pH of the resulting
Q71: For the reaction A<sub>2</sub> + 2 B<sub>3</sub>
Q72: How many moles of electrons,n,are transferred in
Q125: If the entropy of a collection of
Q135: If solution (1)is a saturated solution of
Q140: The gas OF<sub>2</sub> can be produced from
Q180: Which picture represents the system with the
Q209: Calculate the pH of a of 0.100