(A) Nothing
(B) pH goes up because there is less total acid in the solution.
pH goes down because there is less conjugate base to mask the presence of the
acid.
(C)
(D) It depends upon the original concentration of acid and salt.
(E) It is impossible to predict.
65 . What is the mass of nitrogen in a 50.0 g sample of sodium nitrite (NaNO 2 )?
(A) 20.2 g
(B) 16.4 g
(C) 10.1 g
(D) 8.23 g
(E) 23.4 g
66 . Which of the following conditions guarantee a spontaneous reaction?
(A) Positive ∆H, positive ∆S
(B) Positive ∆H, negative ∆S
(C) Negative ∆H, negative ∆S
(D) Negative ∆H, positive ∆S
(E) None of the above
67 . Arrange the following elements in order of decreasing nonmetallic character:
Ge, Sn, Pb, Si
(A) Pb, Sn, Ge, Si
(B) Ge, Sn, Pb, Si
(C) Si, Ge, Sn, Pb
They all have equal nonmetallic character since they are all in the same column of
the periodic table.
(D)
(E) None of the above