A chemist investigates the equilibrium reaction between sulfur dioxide, oxygen, and sulfur
trioxide, shown below.
2SO2(g) + O2(g) 2SO3(g)
• The chemist mixes together SO2 and O2 with a catalyst.
• The chemist compresses the gas mixture to a volume of 400cm3.
• The mixture is heated to a constant temperature and is allowed to reach equilibrium
without changing the total gas volume.
The equilibrium mixture contains 0.0540mol SO2 and 0.0270mol O2.
At the temperature used, the numerical value for Kc is 3.045 × 104 dm3mol–1
Determine the amount, in mol, of SO3 in the equilibrium mixture at this temperature.
Give your final answer to an appropriate number of significant figures.
Show all your working.
the conc of so3 is 1.55 but that would gain me 2 out of 4 marks, the mark scheme requires me to multiply the other conc by 2.45 very confused