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: Karen Notetaker
Karen Notetaker

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

General Chemistry 2 Lecture
Class Notes
25 ?




Popular in General Chemistry 2 Lecture

Popular in Chemistry

This 2 page Class Notes was uploaded by Karen Notetaker on Tuesday March 15, 2016. The Class Notes belongs to gen chemistry 2 at The University of Cincinnati taught by Dr.Wadel in Spring 2016. Since its upload, it has received 9 views. For similar materials see General Chemistry 2 Lecture in Chemistry at The University of Cincinnati.

Similar to gen chemistry 2 at UC


Reviews for :)


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: 03/15/16
In this experiment student became more familiar with the use of the spectrophotometric analysis and gravimetric analysis. The purpose of the experiment is conformed of four main ideas; for the student to use analytical methods to determine the P2O5 percentage in the fertilizer. To provide suggestions on how this methods could have been used for a better analysis based on results and calculations from the experiment. To analyze the quantity of phosphorus in a given sample, and to use a modified technique for the analysis of the fertilizer. In this experiment the spectrophotometric analysis will be used to measure the intensity of a colored compound (PO4 3- ) and the gravimetric analysis will be used to measure the weight of Phosphate as a precipitated insoluble compound. We will analyze how much phosphorus is percent on each compound, where we will use a spectrometer to record and measure spectra as well as the use of MeasureNet to measure the absorbance of a solution to create graphs as a representation of the results for both methods used. We will be using the Beer’s law plot which will help us determine the relation between the concentration and the absorbance of the samples (different volumes) as well as the use of Wavelength vs. Absorbance plot, which will show the relationship between the absorbance of a solution and its wavelength. Techniques used in the laboratory: Filtration, dilution, washing the precipitate using iso-propyl alcohol and the use of a litmus paper to determine when the solution becomes basic with the addition of NH3 Concepts taught in lecture: Beer’s law, Wavelength vs. the absorbance of a solution, spectrophotometric analysis and gravimetric analysis. Mohameds introduction In experiment 25, Fertilizer Project-analysis of phosphorus in fertilizer, is aimed for students to become proficient with two methods for analysing the amount of phosphorus in a sample, modify the procedures in the hand-out for the analysis of fertilizer instead of KH2PO4, and make a recommendation as to which method should be used for future analyses based on the data they get. In this experiment, two different analytical methods are used to determine the P2 O5 percentage in the fertilizer. These methods are spectrophotometric analysis and gravimetric analysis. In the spectrophotometric analysis, the PO4 3- is converted into a colored compound and the intensity of the color is measured. In the gravimetric analysis phosphate is precipitated as an insoluble compound and is weighed. From these two different methods, a good grasp of how much phosphorous is present can be determined. There are several concepts in this experiment such as filtration, which is a mechanical or physical process that used to separate solid particulates form fluids. The second concept is dilution, which is a technique of adding water to a solution in order to lower its concentration. The third concept is Beer’s law plot, which is a plot that shows the relationship between the absorbance vs. concentration of sample with different volumes. The fourth concept is Wavelength vs. Absorbance plot, which is a plot shows the relationship between the absorbance of a particular solution and its wavelength. There are different techniques that used in this experiment such as; Filtration, which is a mechanical or physical process to separate solid particulates from fluids. The second technique was stirring the solution in order to melt a kind of salts in it. The third technique was washing the precipitate, which is a technique used to help the precipitate dry faster using a chemical and in this experiment the chemical that used for washing is iso-propyl alcohol. The fourth technique was using litmus paper to determine when the solution becomes basic while adding NH3. The fifth technique that used in this experiment is the dilution, which is as mentioned before in concepts a technique of adding water to a solution in order to lower its concentration. The sixth technique used was using the MeasureNet, which is a tool used to measure the absorbance of a solution by illuminating light onto it. The seventh technique is using spectrometer, which is an apparatus that used for recording and measuring spectra, especially as a method of analysis.


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."

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

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.