Chemistry Practice Problems The Reaction Quotient Practice Problems Solution: At the start of a certain reaction, only reactants...

# Solution: At the start of a certain reaction, only reactants are present; no products have been formed. What is the value of Qc at this point in the reaction?

###### Problem

At the start of a certain reaction, only reactants are present; no products have been formed. What is the value of Qc at this point in the reaction?

###### Solution

We are being asked to determine the value of the reaction quotient, Qc at the start of a certain reaction, when only reactants are present; no products have been formed.

Recall that the reaction quotient, Q, can be calculated like an equilibrium constant with the formula shown below:

$\overline{){\mathbf{Q}}{\mathbf{=}}\frac{\mathbf{products}}{\mathbf{reactants}}}$

Since there are no products formed, this means that:

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### Additional Practice Problems

The Reaction Quotient

The Reaction Quotient

#### Q. Consider a reaction A2(g) + B2(g) ⇌ 2AB(g), with atoms of A shown in red here and atoms of B shown in blue. If Kc = 1, which system is at equilibrium?

Solved • Thu Jan 03 2019 09:45:02 GMT-0500 (EST)

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#### Q. If Qc&lt; Kc, in which direction will a reaction proceed in order to reach equilibrium?

Solved • Tue Dec 11 2018 13:37:50 GMT-0500 (EST)

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#### Q. What condition must be satisfied so that Qc=Kc?

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#### Q. If Qc&gt; Kc, how must the reaction proceed to reach equilibrium?

Solved • Tue Dec 11 2018 13:37:50 GMT-0500 (EST)