Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: camerobi19 on January 26, 2021, 07:12:21 PM
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1) Determine the mass of phosphorous pentachloride that is produced from a reaction between 166.36 g of phosphorus and 1.20kg of chlorine.
2)calculate the mass of excess that is left over.
3) if 825 g of phosphorus pentachloride was obtained in a lab, what is the percent yield?
Thanks, if you could help. I really do appreciate it. The teacher gave our class this and nobody has been taught it. It is 16 marks so I don’t want it to mess up my mark. Really appreciate if I could get some help. Thanks
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You have to show your attempts or thoughts at solving the question to receive help.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0
hint: you might want to start with a balanced equation
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You have to show your attempts or thoughts at solving the question to receive help.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0
hint: you might want to start with a balanced equation
Hey. Thanks for the response. Where I live class is done online and this teacher hands us worksheets and says go do it. We haven’t learnt this topic and I have no idea where to start. Honestly I would love to share my thoughts or show my knowledge about this but I simply don’t know. Thanks for the hint but I still don’t know how to tackle this question. If you can’t help because of the rules no problem. I appreciate your input.
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I do not know what resources you have for the course you are taking.
For instance are you given a periodic table with the atomic weights of the elements.
Are you using a text book for the course.
But there are online resources you can use such as Wikipedia and Google.
Also you might consider using Youtube.
I did a search in
https://www.youtube.com/ (https://www.youtube.com/)
on
limiting reactant practice problem
and got some good instruction.
Try to solve your problem and come back with the way you did it and the answers
and we will help you if you got it wrong.
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Writing out a reaction equation is usually a good place to start for any problem in chemistry.
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The concept of a limiting reagent is not difficult. It is what one would run out of first. Suppose that my recipe for making a cheese sandwich is two slices of bread plus one slice of cheese makes a sandwich. And suppose that I have six slices of bread and four slices of cheese. What is the limiting reagent, and what is the theoretical yield of sandwiches? I recommend writing this out formally.