Please help with this percentage yield (chemistry) question - can't solve it?

Watch
BerrySpecial
Badges: 4
Rep:
?
#1
Report Thread starter 2 years ago
#1
Please help with this question, I can't figure out how to calculate how much yield of sodium selenite is produced.

Here's the question :
A teacher reacted 5g of selenium oxide and expected to obtain 7.785g of sodium selenite. Using the results below, calculate the percentage yield of the product

Mass of crucible (g) = 24.85

Mass of crucible and selenium dioxide before heating (g) = 29.85

Mass of crucible and sodium selenite after heating (g) = 31.195

Btw here's the formula for this reaction : SeO2 + 2NaOH > Na2SeO3 + H2O (The numbers which come after elements are meant to be small and show the number of atoms)

Thank you!
0
reply
Alina2019
Badges: 18
Rep:
?
#2
Report 2 years ago
#2
Basically actual mass / theoretical mass X 100
So 31.195 /
What he expected which was : 7.785
X 100
Idek about the numbers but the equation is actual / theoretical x 100
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
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

Are you tempted to change your firm university choice on A-level results day?

Yes, I'll try and go to a uni higher up the league tables (23)
26.74%
Yes, there is a uni that I prefer and I'll fit in better (9)
10.47%
No I am happy with my choice (49)
56.98%
I'm using Clearing when I have my exam results (5)
5.81%

Watched Threads

View All