This is a brief study guide to help you answer and review components of experiments #5 to 6 of the General Chemistry Laboratory course for undergraduate students at UCI. Originally made as review flashcards on Quizlet. Includes main objective, special procedures, and calculations.
Experiment #5&6
Study online at https://quizlet.com/_5pyncj
1. Main Objective Synthesize the complex iron salt and then deter-
mine the mass percents of each compound in the
salt through titration.
2. Special Procedures Reduce in the fume hood with sodium bisulfite until
colorless. Neutralize with sodium bicarbanate.
3. Find concentration of 1st subtract the standard from the volume (convert
KMnO4 to L from mL).
Find moles of Na2C2O4.
Convert moles of Na2C2O4 to moles KMnO4
(5 Na2C2O4 :2 KMnO4).
Divide moles of KMnO4 by the volume found previ-
ously.
5. Oxalate Ion Mass Per- 1st take the concentration of KMnO4 and convert to
cent moles KMnO4 using the volume from titration (make
sure to convert L's!).
Take the moles of KMnO4 and convert to moles
C2O42- using ratio (5 C2O42- : 2 MnO4).
Convert the moles to grams.
Take these grams and put over overall grams then
multiply by 100.
8. Mass percent of water Mass of crystals before-mass after desiccation=
mass of water
Then subtract this from the beginning mass and
then divide by the beginning mass x 100
9. Mass percent of iron Correct volume by subtracting standard from origi-
nal (will be MnO4). Convert to L. Multiply by con-
centration to get moles. Convert moles of MnO4 to
1/2
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 PrinceAlixD. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.49. You're not tied to anything after your purchase.
