Can you explain this AS chemistry question?
d) The effect of gentle heat on maleic acid is shown below.
A student predicted that the yield of this reaction would be greater than 80%.
In an experiment,10.0 g of maleic acid were heated and 6.53 g of organic product were obtained.
Is the student correct? Justify your answer with a calculation using these data.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
A student predicted that the yield of this reaction would be greater than 80%.
In an experiment,10.0 g of maleic acid were heated and 6.53 g of organic product were obtained.
Is the student correct? Justify your answer with a calculation using these data.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
Original post by lolsweg
d) The effect of gentle heat on maleic acid is shown below.
A student predicted that the yield of this reaction would be greater than 80%.
In an experiment,10.0 g of maleic acid were heated and 6.53 g of organic product were obtained.
Is the student correct? Justify your answer with a calculation using these data.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
A student predicted that the yield of this reaction would be greater than 80%.
In an experiment,10.0 g of maleic acid were heated and 6.53 g of organic product were obtained.
Is the student correct? Justify your answer with a calculation using these data.
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
I'm not brilliant at these kind of questions, but no-one else has answered so I'll give it a go.
So, %yield is the actual yield/the theoretical yield, multiplied by 100.
I would say the theoretical yield is 10 grams (I would use moles rather than grams but there isn't enough information in the question to work the moles out), as that is what you would expect if no reactant was lost.
The actual yield is of course 6.53 grams.
So then, do 6.53/10 multiplied by 100.
I got 65.3%, so therefore the student is wrong.
Quick Reply
Related discussions
- GCSE Exam Discussions 2024
- Is SnapRevise for chemistry worth the cost ?
- A Level Revision Resources
- Oxford Chemistry Interview
- chemistry help
- A level chemistry
- pls be my chemistry tutor !!
- Is there anyway to do extra chemistry outside of school?
- How do you do NMR questions!?
- Imperial Chemistry Interview
- Westminster 16+ Entrance Exam
- Chemistry ocr Oxford textbook
- A - level choice?
- A level Chemistry Revision
- National 5 Geography 2023
- Kc question (hard?!)
- PGCE - Chemistry - Interview Advice
- Debrecen university online medical entrance exam
- Oxford chemistry
- Hydrolysis
Latest
Last reply 12 minutes ago
Got my crush's number 2 days ago and no reply yet. What could be the reasons?Posted 16 minutes ago
GB News set to axe 40 jobs after channel posts heavy lossesLast reply 17 minutes ago
Rwanda bill likely to be stalled at least till April after seven defeats in the LordsLast reply 18 minutes ago
Why does he act different with me do I make him shy or what ?Posted 23 minutes ago
Sunak rejects offer of youth mobility scheme between EU and UKLast reply 59 minutes ago
Bank Of england degree apprenticeship 2024Last reply 1 hour ago
Feeling inferior compared to syrians as a half moroccan/half whiteLast reply 1 hour ago
Edexcel A Level Business Paper 1 (9BS0 01) - 14th May 2024 [Exam Chat]Last reply 1 hour ago
LSE International Social and Public Policy and Economics (LLK1) 2024 ThreadLast reply 1 hour ago
Atkins Degree Apprenticeship 2024Last reply 1 hour ago
Official University of St Andrews Applicant Thread for 2024
