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

GenChem 001A Week 3

by: Mena Ibrahim

GenChem 001A Week 3 Chem 001A

Mena Ibrahim
GPA 3.6

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

Stoichiometry, finding limiting reagents, balancing equations, and a practice problem
General Chemistry
Hill D
Class Notes
Chemistry, stoichiometry
25 ?




Popular in General Chemistry

Popular in Department

This 5 page Class Notes was uploaded by Mena Ibrahim on Friday October 14, 2016. The Class Notes belongs to Chem 001A at University of California Riverside taught by Hill D in Fall 2016. Since its upload, it has received 8 views.

Similar to Chem 001A at UCR


Reviews for GenChem 001A Week 3


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: 10/14/16
Mena Ibrahim  Elite Notetaker for StudySoup Stoichiometry  Conversion qualitative terms ­ i. balance chemical reactions  i. (to give mole ratios, try to balance the carbons first)  ii. balance elements that come up once,  i. and those that come up at  each side of the reactions.  iii. must know how to convert mass to moles and vis versa.  iv. when you have the reaction in moles, you can find the moles of the  missing chemical the you need and be able to reconvert the mole to mass  to find how much you need to make the chemical reaction balance.  MUST FIND THE LIMITING REAGENT   What is it?  ­ it deters the amount of product. (it is 100% consumed and once it  is runs out, the reaction stops.  i. if you have only one reactant, that isn’t called the limiting reactant. ii. you need more than one reactant in order to determine which single  reactant is  heavily used.               HOW TO FIND LIMITING REAGENT Step 1: Balance the equation.                (2)H + O2 ­> (2) H2O Step 2: use calculator on midterm to determine the limiting reagent.               (check if you have more reactants than product) Step 3:  Q) how much product is obtained from reaction of 20.00g SO3 and 10.00 H2O             (evaluate assuming that you have inline amount of the other product) Step4: Conversion all mass to moles amount reg. *   molar mass  *   mole ratio      *     mass of product  20.00 SO3 * (mole/80.06g)  * (H2SO4/SO3) * (98.07/mole H2SO4)  = 24.5grams  10.0g H2O (mole/18.0g) * (H2SO4/H20) * (98.07g/mole) = 54.7g  Step 5: Now look for which reagent leads the LEAST AMOUNT OF  PRODUCT!!!!!    so the answer for this example would be SO3 will be your limiting reagent,  because it would be the first reagent that would be used up before  H2O.    PERCENT YEILD  Theoretical yield is what you calculate from before Actual yield ­is when you actual weigh in a real life performance of this reaction. > this should never be over 100% because your theoretical yield is  when there has been no type of error occurring at all. But in reality there will be  some minor errors.  Example    Al reacts with Br Liquid, producing AlBr3. In one experiment, 6.0g  Al reacts with an excess of bromine to yield 50.3g aluminum bromide. Calculate  the theoretical and percent yields.  Step 1: Come up with a chemical reaction      (2) Al + (3) Br2 —> (2) AlBr3  Step 2:Calculate the Theoretical Yield      6.0g Al * (mole/ 26.98g) * (2AlBr3)/2Al) * 266.69g/ mole = 59g Now since you have been given the actual percent Step 3: Calculate percent yield         Actual / Theoretical       50.3g/ 59g *100= 85% APPLICATION PROBLEM 1)  You are given a liquid smile that contains methanol (C3OH),  ethanol (C2H5OH) or a mixture of both. You see combustion analysis of a 0.336g sample and obtain 0.462g of CO2. What did you learn about your sample?  Solution:  1. balance equation (2) H3COH * (3) O2 —> (2) CO2 + 4H2O  2. Calculate the limiting reagent:  0.336g H3COH * (mol/32.04g)  (1/2 mole ratio) * product mass = .462g Senario 2)     balance equation: should have  1mole ethanol + 3mole O2 —> 2 mole CO2 + 3 mole of H2O 0.336g * mole/46.07 of ethanol * 2/1 mole ration * 44g of product = 0.641g.  the amount is 0.641g ­ which is not the answer so we know even if you combine  them they will still be off so the correct answer is the first scenario.  Answer: Only Methanol


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

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."

Anthony Lee UC Santa Barbara

"I bought an awesome study guide, which helped me get an A in my Math 34B class this quarter!"

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!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

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.