The following pictures represent solutions at various stages in the titration of a weak diprotic acid H 2 A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A 2- ions.(K + ,H 3 O + initially present,OH - initially present and solvent water molecules have been omitted for clarity).
-Which picture represents the system at the first equivalence point?
A)(1)
B)(2)
C)(3)
D)(4)

Question

The following pictures represent solutions at various stages in the titration of a weak diprotic acid H 2 A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A 2- ions.(K + ,H 3 O + initially present,OH - initially present and solvent water molecules have been omitted for clarity). 
-Which picture represents the system at the first equivalence point?
A)(1) 
B)(2) 
C)(3) 
D)(4)

Quizplus · Accepted Answer

The Answer of The following pictures represent solutions at various stages in the titration of a weak diprotic acid H 2 A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A 2- ions.(K + ,H 3 O + initially present,OH - initially present and solvent water molecules have been omitted for clarity). 
-Which picture represents the system at the first equivalence point?
A)(1) 
B)(2) 
C)(3) 
D)(4)

The Following Pictures Represent Solutions at Various Stages in the Titration