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Topic: Limiting Reagents???  (Read 4052 times)

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Offline Shea

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Limiting Reagents???
« on: August 01, 2006, 06:49:08 PM »
Limiting Reagent Problem:
Oxygen reacts with SO2 to produce SO3,

2SO2 + O2 -> 2SO3

6 moles of O2 react with 10 moles of SO2


6. How many moles of O2 are required to react with 10 moles of SO2?

7. How many moles of SO2 are required to react with 6 moles of O2?

8. How many moles of the excess reagent are left?

9. How many moles of SO3 are produced?

COuld you explain what limiting reagents are, and what excess reagents are?

I think the first 2 questions are just the ratios again, but for the second 2, I'm lost.  First of all, I don't really get the question.  Are they saying that the ratios should be like in the equation, or the, "6 moles of O2 react with 10 moles of SO2 ?"

Could you explain what limiting reagents and excess reagents are?

Offline Borek

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Re: Limiting Reagents???
« Reply #1 on: August 01, 2006, 07:10:04 PM »
Are they saying that the ratios should be like in the equation, or the, "6 moles of O2 react with 10 moles of SO2 ?"

Ratios are like in the equation. 6 moles of O2 has been mixed with 10 moles of SO2, but they can react only as described by the reaction equation - thus one will react to the end and part of the second will be left.

Quote
Could you explain what limiting reagents and excess reagents are?

http://www.chembuddy.com/?left=balancing-stoichiometry&right=limiting-reagents

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