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 choicesCarbon Dioxide (CO2)Water (H2O)Oxygen Gas (O2)Methane (CH4)
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 choicesCarbon Dioxide (CO2)Water (H2O)Oxygen Gas (O2)Methane (CH4)
Solution
The limiting reagent in a chemical reaction is the reactant that is completely consumed first and determines when the reaction stops.
The balanced chemical equation CH4 + 2O2 --> CO2 + 2H2O tells us that one mole of methane (CH4) reacts with two moles of oxygen gas (O2) to produce one mole of carbon dioxide (CO2) and two moles of water (H2O).
Given: Moles of CH4 = 0.8 mol Moles of O2 = 1.8 mol
Step 1: Determine the mole ratio of CH4 to O2 from the balanced chemical equation, which is 1:2.
Step 2: Compare the given mole ratio of CH4 to O2 with the balanced equation.
The given mole ratio is 0.8 (CH4) to 1.8 (O2), which simplifies to approximately 1:2.25. This means there is less CH4 available for the reaction than O2, relative to what the reaction requires.
Therefore, methane (CH4) is the limiting reagent in this reaction.
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