Solution: Will a precipitate form when 10 mL of 0.015 M [Hg +] and 10 mL of 0.015 M [SO 4 2-] are mixed?
Ksp of Hg2SO4 is 6.5 x 10 -7.
a. Yes; Q = 3.4 x 10 -6 which is larger than Ksp, a precipitate will form.
b. No; Q = 3.4 x 10 -6 which is larger than Ksp, a precipitate will not form.
c. Yes, Q = 4.2 x 10 -7 which is smaller than Ksp, a precipitate will form.
d. No; Q = 4.2 x 10 -7 which is smaller than Ksp, a precipitate will not form.
e. No; Q = 3.4 x 10 -12 which is smaller than Ksp, a precipitate will not form.

Will a precipitate form when 10 mL of 0.015 M [Hg ^{+}] and 10 mL of 0.015 M [SO _{4 }^{2-}] are mixed?

Ksp of Hg_{2}SO_{4} is 6.5 x 10 ^{-7}.

a. Yes; Q = 3.4 x 10 ^{-6} which is larger than Ksp, a precipitate will form.

b. No; Q = 3.4 x 10 ^{-6} which is larger than Ksp, a precipitate will not form.

c. Yes, Q = 4.2 x 10 ^{-7} which is smaller than Ksp, a precipitate will form.

d. No; Q = 4.2 x 10 ^{-7} which is smaller than Ksp, a precipitate will not form.

e. No; Q = 3.4 x 10 ^{-12} which is smaller than Ksp, a precipitate will not form.