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# Reaction Quotients for Heterogeneous Systems in Solution

APCHEM-XKW5A9

The reaction between aqueous solutions of silver nitrate and sodium chromate occurs according to the following equation.

$$2 AgN{ O }_{ 3 }(aq) + N{ a }_{ 2 }{ CrO }_{ 4 }(aq) \rightleftarrows { Ag }_{ 2 }{ CrO }_{ 4 }(s) + 2 Na{ NO }_{ 3 }(aq)$$

Which of the following is the correct reaction quotient expression for this system?

A

$Q = \cfrac { \left[ { Ag }_{ 2 }Cr{ O }_{ 4 } \right] { \left[ Na{ NO }_{ 3 } \right] }^{ 2 } }{ { \left[ AgN{ O }_{ 3 } \right] }^{ 2 }\left[ { Na }_{ 2 }Cr{ O }_{ 4 } \right] }$

B

$Q = \cfrac { { \left[ Na{ NO }_{ 3 } \right] }^{ 2 } }{ { \left[ AgN{ O }_{ 3 } \right] }^{ 2 }\left[ { Na }_{ 2 }Cr{ O }_{ 4 } \right] }$

C

$Q = \cfrac { { \left[ { Ag }_{ 2 }Cr{ O }_{ 4 } \right] \left[ Na{ NO }_{ 3 } \right] } }{ { \left[ AgN{ O }_{ 3 } \right] } }$

D

$Q = \cfrac { { { \left[ { NaNO }_{ 3 } \right] }^{ 2 } } }{ { { \left[ { AgNO }_{ 3 } \right] }^{ 2 } } }$