What is the pH change (ApH) when 50 ml 0.2 M NaOH is added to 200 ml mixture of buffer solution containing 0.15
Macetic acid and 0.2 M sodium acetate?

a. 3
b.4.44
c.0.1
d.4.54​

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.