New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Georgianna Gusikowski Jr.

Laboratory CHM114

Georgianna Gusikowski Jr.

GPA 3.58


Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Class Notes
25 ?




Popular in Course

Popular in Chemistry

This 2 page Class Notes was uploaded by Georgianna Gusikowski Jr. on Thursday October 29, 2015. The Class Notes belongs to CHM114 at Wilkes University taught by Staff in Fall. Since its upload, it has received 22 views. For similar materials see /class/230987/chm114-wilkes-university in Chemistry at Wilkes University.


Reviews for Laboratory


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 10/29/15
Complex Formation The Method of Continuous Variation Using Spectrophotometry Name Partner Course Date Expt Performed Instructions complete the following form being sure to show the requested calculations answer all questions and attach the requested graphs and spreadsheets Purpose Data Solution Ratio Average SCN39 Fe Absorbance Spreadsheets Graphs and Calculations 1 Make a plot of absorbance vs wavelength for the complex of Fe3aq and SCN aq Identify Amax on this graph What color was the solution of your complex Does the Amax for your complex fall in the range expected Explain 2 Make a second plot This graph will have the absorbance K of your mixtures plotted on the yaxis against the ratios of Fe3aq and SCN aq present in these mixtures on the xaxis Be sure to include the pure Fe3aq solution at one end of the xaxis and the pure SCN39aq solution at the opposite end of the xaxis The maximum absorbance on this graph should occur for the mixture that has the stoichiometric ratio of Fe3aq to SCN39aq Write a reaction showing the formation of the complex from the Fe3aq and SCN aq using the smallest whole number ratios Also determine the initial concentration of both the Fe3aq and SCN aq present in this mixture prior to any complex formation Also determine the maximum concentration of complex that could be formed from this mixture Fe3aq and SCN aq all converted to complex 3 Draw tangents to the low absorbance portions of the curve plotted in step 2 These tangent lines should intersect at a point above the solution for which you measured the maximum absorbance see the Figure for the example of the equilibrium between Fe2 and ophenanthroline C12H8N2 am in the Introduction 4 Use the ratio method discussed in the example of the equilibrium between Fe2 and o phenanthroline to nd the concentration of the complex observed in your experiment Remember for the reaction FeHZO63aq n HSCNaq ltgt FeHzO6nSCNn339n aq n H3012 the concentration of the complex observed can be found from complex0bs Aobs complexhnax Ame1X and the formation constant Kf calculated from the equilibrium concentrations of all three species present at equilibrium 37 K FeH206n SCNn H30 1 FeH2063HSCN1 NOTE these absorbance values actually contain a small contribution from the absorbance of unreacted Fe3aq and SCN39aq Question respond with clarity in concise well structured sentences 1 Look at the magnitude of the absorbance of the pure solutions of Fe3aq and SCN aq Also consider the size of Kf Demonstrate mathematically the amount of error caused in Kf by not correcting for the absorbance of unreacted Fe3aq and SCN aq 2


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Allison Fischer University of Alabama

"I signed up to be an Elite Notetaker with 2 of my sorority sisters this semester. We just posted our notes weekly and were each making over $600 per month. I LOVE StudySoup!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.