Question

What is the reaction quotient for the following chemical reaction at 298K, given the concentrations of the reactants and products?2NO (g) + O2 (g) ⇌ 2NO2 (g)[NO] = 0.50 M[O2] = 0.25 M[NO2] = 0.75 M

Answer 1

The reaction quotient  Q  is calculated using the concentrations of the reactants and products raised to the power of their stoichiometric coefficients in the balanced chemical equation. For the given reaction:2NO  g  + O2  g   2NO2  g The formula for Q is:Q =  [NO2]^2  /  [NO]^2 * [O2] Given the concentrations:[NO] = 0.50 M[O2] = 0.25 M[NO2] = 0.75 MPlug the values into the formula:Q =  0.75^2  /  0.50^2 * 0.25 Q =  0.5625  /  0.25 * 0.25 Q = 0.5625 / 0.0625Q = 9The reaction quotient  Q  for the given reaction at 298K is 9.