Question

Wine goes bad soon after opening because the ethanol ch3ch2oh in it reacts with oxygen gas o2 from the air to form water h2o and acetic acid ch3cooh , the main ingredient of vinegar. what mass of acetic acid is produced by the reaction of 7.0g of oxygen gas?

Answer 1

4.3 g

Explanation:

We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.

M_r: 60.05 32.00

CH₃CH₂OH + 3O₂ ⟶ 2CO₂ + 3H₂O

Mass/g: 7.0

1. Calculate the moles of O₂

Moles O₂ = 7.0 × 1/32.00

Moles O₂ = 0.219 mol O₂

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2. Calculate the moles of CH₃CH₂OH

The molar ratio is 1 mol CH₃CH₂OH:3 mol O₂

Moles of CH₃CH₂OH = 0.219 × 1/3

Moles of CH₃CH₂OH = 0.0729 mol CH₃CH₂OH

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3. Calculate the mass of CH₃CH₂OH

Mass of CH₃CH₂OH = 0.0729 × 60.05

Mass of CH₃CH₂OH = 4.4 g