SAT Subject Test Chemistry,10 edition

(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