Percentage Yield Watch

abey_27
Badges: 0
#1
Report Thread starter 9 years ago
#1
heyy,

If the percentage yield for a reaction is 100%, 60g of reactant A would make 80g of prodcut C. How much of reactant A is needed to make 80g of product C if the percentage yield of the reaction is only 75%?

im not entirely sure how to do this qusstion, because it is different from the traditional style percentage yield Q's.

I got 105g of reactant A is needed if the percentage yield is 75%. I figured 1% of 60g is 0.6g, therefore 75% is 45, 60+45=105g. Is this correct?

thank you!
0
reply
Zedd
Badges: 11
Rep:
?
#2
Report 9 years ago
#2
take the info from the 100% and...
Product / Reactant = Yield (grams)

then take the yield (grams) and multiply with the new percentage yield (75%)
Yield (grams) x 0.75 (percentage yield) = New Yield (grams)

now take your new yield and multiply it with the amount of product required to find the amount of reactant you need
New Yield (grams) x 80g = Reactant required (grams)

As per usual I'm sure there are normal or simpler ways of doing it but that is how I've always done it in my head.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cranfield University
    Cranfield Forensic MSc Programme Open Day Postgraduate
    Thu, 25 Apr '19
  • University of the Arts London
    Open day: MA Footwear and MA Fashion Artefact Postgraduate
    Thu, 25 Apr '19
  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (129)
38.62%
No - but I will (19)
5.69%
No - I don't want to (25)
7.49%
No - I can't vote (<18, not in UK, etc) (161)
48.2%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise