Adiprotic acid, h2a, has acid dissociation constants of ka1=3.58×10−4 and ka2=2.21×10−12. calculate the ph and molar concentrations of h2a, ha−, and a2− at equilibrium for each of the solutions. a 0.175 m solution of h2a. ph = [h2a]= m [ha−]= m [a2−]= m a 0.175 m solution of naha. ph= [h2a]= m [ha−]= m [a2−]= m a 0.175 m solution of na2a. ph= [h2a]= m [ha−]= m [a2−]= m

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.