In a closed container, dissolved substance R changes reversibly into dissolved substance S. The forward reaction forms S from R. Initially, the solution contains S but no R.
Which statement describes the relationship between the forward and reverse reaction rates at the start and at dynamic equilibrium?
The reverse rate is greater at the start, and the rates are equal at dynamic equilibrium.
The reverse rate is greater at the start, and the forward rate is greater at dynamic equilibrium.
The forward rate is greater at the start, and the rates are equal at dynamic equilibrium.
The forward rate is greater at the start, and the reverse rate is greater at dynamic equilibrium.
124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.