Test Your Witts!!

The following are more example problems for you to work through. Try the problem, then watch the video for the solution. This is a good chance to see how others approach limiting reagent problems.

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Problem #1:

4 NH₃ + 5 O₂ ----> 4 NO + 6 H₂O

If 34 g of NH₃ are reacted with 32 g of O₂, how many g of NO are produced?

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Problem #4:

P₄ reacts with oxygen gas to produce diphosphorus pentoxide. If 8.00 g of P₄ is reacted with 8.00 g of oxygen gas, how many grams of diphosphorus pentoxide are formed?

(Note the one minor error that the video makes while working the problem around the 4:21 mark....he should have used a 2:5 ratio. This final answer is still correct!)

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Problem 5:

Al + Br₂ ------> Al₂Br₆

If 3 mol of aluminum is reacted with 3 mol of bromine, which one is the limiting reagent?

(Note: The video does not get to this problem until the 6:19 mark. However, the beginning of this video is an excellent review of limiting reagent concepts.)