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Reaction Quotients for Heterogeneous Systems

APCHEM-NLC4AW

$$2 Li(s) + 2 { H }_{ 2 }O(l) \longrightarrow 2 LiOH(aq) + { H }_{ 2 }(g)$$

Which of the following is the CORRECT reaction quotient expression for the reaction between lithium metal and water shown above?

A

$Q = \cfrac { { \left[ LiOH \right] }^{ 2 }\left[ { H }_{ 2 } \right] }{ { \left[ Li \right] }^{ 2 }{ \left[ { H }_{ 2 }O \right] }^{ 2 } } $

B

$Q = \cfrac { { \left[ LiOH \right] }^{ 2 }\left[ { H }_{ 2 } \right] }{ { \left[ { H }_{ 2 }O \right] }^{ 2 } } $

C

$Q={ \left[ LiOH \right] }^{ 2 }\left[ { H }_{ 2 } \right] $

D

$Q = \cfrac { { \left[ LiOH \right] }^{ 2 }{ \left[ { H }_{ 2 } \right] }^{ 2 } }{ { \left[ Li \right] }^{ 2 } } $