Reaction Coefficient, Q

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Reaction Coefficient, Q

Postby ryan_macdougall_3B_2C » Sun Feb 11, 2018 10:05 pm

On page 431 of the textbook it introduces the formula for the reaction coefficient:
Q = [(a subC)^c x (a subD)^d]/ [(a subA)^a x (a subB)^b] . What does this equation tell us, when is it useful, and what do the variables stand for? The book did not explain this well.

Thu Uyen Tran 1B
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Re: Reaction Coefficient, Q

Postby Thu Uyen Tran 1B » Sun Feb 11, 2018 10:14 pm

Q, in comparison to K, tells us whether reaction is favors the products or reactants. When Q>K, the reaction favors reactants. When Q<K, the reaction favors the products. It's basically products/reactants, each component raised to the number of moles in the chemical formula.

Max Mazo 2C
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Re: Reaction Coefficient, Q

Postby Max Mazo 2C » Sun Feb 11, 2018 11:35 pm

The lowercase letters a, b, c, and d all refer to the molar coefficients of each part of the reaction, and the upper case letters A, B, C, and D refer to the components of the reaction, with C and D as products and A and B as reactants.

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