CHEM 121 LAB FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED AND GRADED A+ ALREADY PASSED
8 views 0 purchase
Course
CHEM 121
Institution
CHEM 121
CHEM 121 LAB FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED AND GRADED A+ ALREADY PASSED
Which method of analysis generally is the fastest method, gravimetric or volumetric?
Volumetric
The label on plant food reads 25-20-17. What does this mean?
25% nitrogen
20% phosphorus
17% potass...
CHEM 121 LAB FINAL EXAM QUESTIONS WITH
COMPLETE SOLUTIONS VERIFIED AND GRADED A+
ALREADY PASSED
Which method of analysis generally is the fastest method, gravimetric or
volumetric?
Volumetric
The label on plant food reads 25-20-17. What does this mean?
25% nitrogen
20% phosphorus
17% potassium
Differentiate between qualitative and quantitative analysis.
Qualitative is what is in the sample, quantitative is how much of something is in the
sample.
There is a 1.290 g of phosphorus P in a 10.00 g sample of MgNH4PO4x6H20. What
is the sample percentage of P in the sample?
1.290/10.00 = .129g x 100 = 13%
How do you find out the limiting reactant in an experiment?
Which ever reactant runs out first is your limiting.
A student prepares a compound that contains 1.020g of Zn (atomic mass= 65.4
amus) and 1.108g cl (Am= 35.5) What is the empirical formula of the compound.
step one: divide g over the atomic mass= 1.020/65.5 = 0.0156.
1.108/35.5 =.0312
take the smallest number and divide it by both.
.0156/.0156=1 Zn
.0312/.0156= 2 Cl
ZnCl2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseAdvocate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
