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Carbon monoxide can be oxidised to carbon dioxide - VCE - SSCE Chemistry - Question 13 - 2006 - Paper 1
Question 13
Carbon monoxide can be oxidised to carbon dioxide. 2CO(g) + O2(g) → 2CO2(g) 3 mol of CO and 2 mol of O2 are mixed. When the reaction is complete there will be A. 4... show full transcript
Worked Solution & Example Answer:Carbon monoxide can be oxidised to carbon dioxide - VCE - SSCE Chemistry - Question 13 - 2006 - Paper 1
Step 1
Calculate the moles of reactants
Answer
From the balanced equation, 2 moles of CO react with 1 mole of O2 to produce 2 moles of CO2. Given 3 moles of CO and 2 moles of O2 mixed:
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Theoretical moles of CO required for 2 moles of O2:
Since 2 moles of CO react with 1 mole of O2, we need:
2 * 2 = 4 moles of CO for 2 moles of O2.
But, we only have 3 moles of CO, hence CO is the limiting reactant.
Step 2
Determine the amount of CO2 produced
Answer
Using the stoichiometry of the balanced equation: Having 3 moles of CO, according to the reaction, we can generate:
3 moles of CO will produce 3 moles of CO2 as per the ratio of 2:2 in the reaction equation. Hence, 3 moles of CO will yield only 3 moles of CO2.
Step 3
Calculate the leftover reactants
Answer
Post-reaction, since the O2 reacts with 3 moles of CO, we can find out how much O2 was consumed:
- According to the reaction, from 2 moles of O2, consuming 3 moles of CO will require 1.5 moles of O2. Therefore,
remaining unreacted O2 = initial O2 - consumed O2 = 2 moles - 1.5 moles = 0.5 moles of O2 unreacted.
Step 4