For the following reaction, which would be the limiting reagent? CH4 + 2O2 --> CO2 +2H2O You add 0.8 mol of methane (CH4) and 1.8 mol of oxygen gas Group of answer choicesWater (H2O)Oxygen Gas (O2)Methane (CH4)Carbon Dioxide (CO2)
Question
For the following reaction, which would be the limiting reagent? CH4 + 2O2 --> CO2 +2H2O You add 0.8 mol of methane (CH4) and 1.8 mol of oxygen gas Group of answer choicesWater (H2O)Oxygen Gas (O2)Methane (CH4)Carbon Dioxide (CO2)
Solution
To determine the limiting reagent, we need to compare the mole ratio of the reactants to the coefficients in the balanced chemical equation.
The balanced chemical equation is CH4 + 2O2 --> CO2 + 2H2O.
This tells us that one mole of methane (CH4) reacts with two moles of oxygen (O2) to produce one mole of carbon dioxide (CO2) and two moles of water (H2O).
We have 0.8 moles of methane and 1.8 moles of oxygen.
The ratio of methane to oxygen is 0.8/1 = 0.8.
The ratio of oxygen to methane is 1.8/2 = 0.9.
Since the ratio of methane to oxygen is less than the ratio of oxygen to methane, methane (CH4) is the limiting reagent. It will be completely consumed first in the reaction.
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