Question

In the reaction below, what volume of PCl5(g) will be produced by the reaction of 18.9...

In the reaction below, what volume of PCl5(g) will be produced by the reaction of 18.9 L of chlorine gas with excess phosphorus (P4) if all gas volumes are measured at STP?
P4(g) + Cl2(g) => PCl5(g)(unbalanced)
Enter your answer with two decimal places and no units.

The answer should be 7.56, but I keep getting 6.92.

Balanced P4 + 10Cl2 ----> 4PCl5

1 atm * 18.9L = n (.0821)*(298)

0.7725*(4/10)*22.4

=6.92 , I multiplied it times 22.4 because its asking for volume and everything is in STP.

What am I doing wrong?

0 0
Add a comment Improve this question Transcribed image text
Answer #1

Reaction is

P4 + 10 Cl2\rightarrow 4PCl5

Accoding to avogadro's law at STP 1 mole of gas occupy volume 22.414 L then 18.9 L of chlorine = 18.9/22.414 = 0.8432229856 mole

According to reaction 10 mole of clorine produce 4 mole of PCl5 then 0.8432229856 mole of chlorine produce

0.8432229856 \times 4 /10 = 0.3372891942 mole of PCl5

Accoding to avogadro's law at STP 1 mole of gas occupy volume 22.414 L then 0.3372891942 mole of PCl5 occupy volume = 0.3372891942 \times 22.414 = 7.559999 L = 7.56 L

Add a comment
Know the answer?
Add Answer to:
In the reaction below, what volume of PCl5(g) will be produced by the reaction of 18.9...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT