Q32 · Practice questionComplex familiar4 marks
QUESTION 32 (4 marks)
For , at a fixed temperature. Initially a 2.0 L vessel contains 0.80 mol A and no B.
a) Write the equilibrium expression. [1 marks]
b) Calculate the equilibrium concentrations of A and B. [3 marks]
WORKED SOLUTION
4 marksPractice marking scheme
; , .
Initially . Let and . Then , so .
- Writes [B]/[A]. [1 marks]
- Calculates initial [A] = 0.40 mol L⁻¹. [1 marks]
- Uses 3.0 = x/(0.40−x). [1 marks]
- Obtains both equilibrium concentrations. [1 marks]
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