Chemistry 0620 · IGCSE · Reversible reactions and equilibrium
Reversible reactions and equilibrium — practice question
Nitryl chloride, $\text{NO}_2\text{Cl}$, reacts with nitric oxide, NO, and the forward change gives out heat.
$\text{NO}_2\text{Cl}$(g) + NO(g) $\rightleftharpoons$ $\text{NO}_2$(g) + NOCl(g)
This reaction is able to establish equilibrium.
(a)[2]
What is meant by equilibrium in a reversible reaction?
(b)[3]
Explain why raising the temperature increases the reaction rate.
(c)[2]
State and explain the effect, if any, of increasing the temperature on the position of equilibrium.
(d)[2]
State and explain what effect, if any, decreasing the pressure has on the position of equilibrium.
(e(i))[2]
Complete the dot-and-cross diagram to show how the outer-shell electrons are arranged in nitrosyl chloride.
(e(ii))[2]
Explain why the boiling point of nitrosyl chloride is low.
Worked solution & mark scheme
This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: “any two of: the forward and reverse reactions happen at the same rate; the quantities/moles/concentrations stay unchanged; a closed system” …