Question

consider the reaction h₂(g) + i₂(g) ⇌ 2hi(g). what is the reaction quotient, q, for this system when h₂=0.100 m, i₂=0.200 m, and hi=3.50 m?
87.5
175
350
613

Explanation:

Step1: Write reaction quotient formula

For the reaction $H_2(g)+I_2(g)
ightleftharpoons 2HI(g)$, the reaction - quotient formula is $Q = \frac{[HI]^2}{[H_2][I_2]}$.

Step2: Substitute given concentrations

Substitute $[H_2]=0.100\ M$, $[I_2]=0.200\ M$, and $[HI]=3.50\ M$ into the formula:
$Q=\frac{(3.50)^2}{0.100\times0.200}=\frac{12.25}{0.02}=612.5\approx613$.

Answer:

613