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The combustion of carbon(II)oxide in oxygen can be…

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CHEMISTRY

The combustion of carbon(II)oxide in oxygen can be represented by equation 2CO + O2 = 2CO2. Calculate the volume of the resulting mixture at the end of the reaction if 50cm3 of carbon(II)oxide was exploded in 100cm3 of oxygen

QUICK ANSWER…

B

SOLUTION 

Given a balanced equation, the ratio of moles of the reactants and products is exactly the ratio of their volume provided they are gasses. This means:

2 volumes of carbon monoxide is required to react with 1 volume of oxygen to produce 2 volumes of carbon dioxide, provided they are all in gaseous state. This also means,

The combustion of carbon(II)oxide in oxygen can be

Now for the right answer to the above question:

  1. Option A is incorrect.
  2. Option B is correct.
  3. C is incorrect.
  4. D is not the correct answer.

KEY-POINTS…

You may please note these/this:

  • Resulting volume of the mixture must be equal to the volume of the product plus that of the unreacted or excess oxygen, always remember this.
  • If there are no excess, the volume of the mixture at the end of reaction is equal to the volume of the product only.

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/culled from 2019 JAMB-UTME Chemistry question 20/

3 Answers

  1. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Please I need more explanation on this volume stuff

    Goodluck Johnson - Apr 28, 2021 | Reply

  2. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Before solving any problem involving the volume of a reactant or product, you must first of all make sure you balance the equation. It is after balancing the equation that you can now easily determine the volume of any of the gaseous reactants or products if you know the volume of at least one of them.

    Admin - Apr 28, 2021 | Reply

  3. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    For instance, in the reaction above, after balancing, we realize that 2 volumes of CO is needed to react with 1 volume of O2 to produce 2 volumes of CO2. This also means that if you decide to react 50 liter of CO with O2, you must do so with half of it which is 25 liters to produce 50 liters of CO2. in the same idea, if you mix 50 liter of CO with 100 liter of O2, only 25 liter out of it will react, the remaining 75 liter will be left over excess. this is what you will learn in your first year university chemistry… Another thing is you must also know that volume only applies to gaseous products and reactants. for solid and aqueous reactants and products, we will be talking of mass, mole and concentration.

    Admin - Apr 28, 2021 | Reply


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