Uploaded May 2021 | Updated September 2026, 1 week ago
Why do reactions stop? In this video, we use the sandwich metaphor to make limiting reactants and percent yield intuitive. We move past the confusing math to help you identify the excess reactant and calculate theoretical vs actual yield with confidence.
This is a core skill for general chemistry 1 and the MCAT. By the end of this video, you'll be able to solve complex stoichiometry problems without second-guessing your steps.
🍵Buy the Professor a tea to keep the videos coming: patreon.com/c/ChemistryinaNutshell
🧪 For the chemist who prefers eyebrows: Grab the complete collection of 11 hand-drawn lab safety posters: payhip.com/b/SNQL0
🔬As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you. Start your shopping here: amazon.com/shop/chemnut?ccs_id=11f20bce-5f74-427b-85fb-bdf66849405a
Time Stamps:
0:22 Limiting reactants / limiting reagents - explanation of concept
4:03 Definitions of limiting reactant and theoretical yield
4:59 Practice problem for limiting reactant and theoretical yield
12:10 Definitions of actual yield and percent yield
13:57 Practice problem for percent yield
Image Credits:
Photo by Giorgi Iremadze: pexels.com/photo/ingredients-of-delicious-sandwich-6597062
#LimitingReactant #PercentYield #chemistry
Why do reactions stop? In this video, we use the sandwich metaphor to make limiting reactants and percent yield intuitive. We move past the confusing math to help you identify the excess reactant and calculate theoretical vs actual yield with confidence.
This is a core skill for general chemistry 1 and the MCAT. By the end of this video, you'll be able to solve complex stoichiometry problems without second-guessing your steps.
🍵Buy the Professor a tea to keep the videos coming: patreon.com/c/ChemistryinaNutshell
🧪 For the chemist who prefers eyebrows: Grab the complete collection of 11 hand-drawn lab safety posters: payhip.com/b/SNQL0
🔬As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you. Start your shopping here: amazon.com/shop/chemnut?ccs_id=11f20bce-5f74-427b-85fb-bdf66849405a
Time Stamps:
0:22 Limiting reactants / limiting reagents - explanation of concept
4:03 Definitions of limiting reactant and theoretical yield
4:59 Practice problem for limiting reactant and theoretical yield
12:10 Definitions of actual yield and percent yield
13:57 Practice problem for percent yield
Image Credits:
Photo by Giorgi Iremadze: pexels.com/photo/ingredients-of-delicious-sandwich-6597062
#LimitingReactant #PercentYield #chemistry

![Build a Professional Lightboard for Online Teaching (DIY Guide)
Bring an in-person feeling to your remote classroom with a DIY Lightboard!
⚠️ DISCLAIMER: This video was made before I learned how to act like a human on camera. Its a bit robotic, but the instructions will still save you hundreds of dollars compared to a professional setup.
⚡ A BETTER SET-UP
If youre looking to see what this setup looks like when firing on all cylinders, check out a newer chemistry video: https://youtu.be/N2ppCPP8B1I
Upgrades:
• #1 Priority (Lighting): https://amzn.to/4tf7Bw4
• The Camera (Sony a6400): https://amzn.to/4tLuEyv
• The Do-It-All Lens: https://amzn.to/4t32A9M
• The Microphone: https://amzn.to/4ekL6RJ
• Wireless Mic Transmitter & Receiver: https://amzn.to/41sFXj0
🧪 PATREON. Because I know youre watching this to support free chemistry education: https://www.patreon.com/c/ChemistryinaNutshell
🛠️ THE ORIGINAL DIY GEAR
These are the bones of the lightboard as shown in this video and still used today:
• Neon dry erase markers: https://amzn.to/4tKUH8L
• LED Strip Lights: https://amzn.to/4dR02Hf
• Black Backdrop: https://amzn.to/3QaqB02
• The Plexiglas: [Standard hardware store acrylic]
📉THE RETIRED GEAR
• $10 Microphone that (unfortunately) purrs like a kitten in my older videos: https://amzn.to/4vIxbeG
As an Amazon Associate I earn from qualifying purchases.
Timestamps:
0:00 Introduction
4:27 Tour of setup
6:45 Demonstration of StreamLabs OBS software for Live Online Teaching
11:00 Use of lightboard while teaching a live online class
12:08 Choosing a sheet of acrylic glass
13:33 Erasing the text
15:24 Purposeful Outtakes Build a Professional Lightboard for Online Teaching (DIY Guide)](https://i.ytimg.com/vi/kXJu6-4u7UY/mqdefault.jpg)






![How Does Science Correct Itself? The Scientific Method in Action
In April 2020, public health officials in the US did a complete 180 and started mandating masks. Believe it or not, this was an example of the scientific method working.
Related Units:
If you want a strong foundation for chemistry, watch the full playlist: https://www.youtube.com/playlist?list=PLvUW25kBaMMssGHFrR4Ee7 8cFBvBkgN
If youre studying early atomic theory, this playlist is your friend: https://www.youtube.com/playlist?list=PLvUW25kBaMMszGN5XY0QXNP_t-9Z-B8C2
If youre studying for the MCAT: https://www.youtube.com/playlist?list=PLvUW25kBaMMuJZI5IVWO8X0syBANn-YqY
🍵Buy the Professor a tea to keep the videos coming: https://www.patreon.com/c/ChemistryinaNutshell
🧪 For the chemist who prefers eyebrows: Grab the complete collection of 11 hand-drawn lab safety posters: https://payhip.com/b/SNQL0
🔬As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you. Start your shopping here: https://www.amazon.com/shop/chemnut?ccs_id=11f20bce-5f74-427b-85fb-bdf66849405a
Citation:
Turbulent Gas Clouds and Respiratory Pathogen Emissions Potential Implications for Reducing Transmission of COVID-19 Lydia Bourouibia (26 March 2020)
Full Article: https://jamanetwork.com/journals/jama/fullarticle/2763852
Dr. Wu Lien-teh Recommended Reading / Listening:
https://99percentinvisible.org/episode/masking-for-a-friend/
https://www.newscientist.com/people/dr-wu-lien-teh/
https://www.gavi.org/vaccineswork/100-years-and-counting-mask-wearing-japan
Time Stamps:
0:00 Changing Public Health Info - Early 2020 US
1:14 Dr. Wu Lien-teh – Early Face Mask Pioneer
1:50 Scientific Breakthroughs in the Public Eye
2:42 What does Isaac Newton have to do with this?
3:58 Old Tuberculosis Data & New Research
4:57 The Scientific Method Worked!
Timeline of News Stories:
28 Jan 2020 https://www.cnn.com/2020/01/28/health/coronavirus-us-masks-prevention-trnd/index.html
29 Jan 2020 https://kesq.com/news/2020/01/29/cdc-says-wearing-a-face-mask-wont-protect-you-from-the-coronavirus/
31 Jan 2020 https://www.cnbc.com/2020/01/31/china-coronavirus-shortage-of-face-masks-could-pose-risks-for-healthcare-workers.html
03 Apr 2020 https://www.npr.org/sections/coronavirus-live-updates/2020/04/03/826219824/president-trump-says-cdc-now-recommends-americans-wear-cloth-masks-in-public
Stock Image and Video Credits:
“Covid Virus” https://www.pexels.com/photo/coronavirus-3992933/
“Face Mask” https://pixabay.com/illustrations/face-mask-surgical-mask-medical-mask-5640516/
“Wu Lien-the – c. 1910-1915” https://commons.wikimedia.org/wiki/File:Wu_Lien-teh c._1910%E2%80%931915.jpg
Library of Congress, Prints & Photographs Division, [reproduction number, e.g., LC-B2-1234]
“Plague suspected [sic] discovered on inspection tour 7385441” by ralphrepo is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/?ref=openverse.
Dr. Ku and assistant in front of old style Chinese plague hospital, Fuchiatien 7385467 by ralphrepo is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/?ref=openverse.
Aerial Photography of Great Wall of China by Manuel Joseph https://www.pexels.com/photo/aerial-photography-of-great-wall-of-china-19872/
“Newspaper Template” https://pixabay.com/illustrations/newspaper-news-design-schema-412811/
Mycobacterium tuberculosis Bacteria, the Cause of TB by NIAID is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/?ref=openverse.
File:FC Cincinnati social distancing COVID-19 2020-08-21.jpg by Jamie Smed from Cincinnati, Ohio is licensed under CC BY 2.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/2.0/?ref=openverse.
Free B Roll provided by Videezy.com
“Times Square Street Sign”
Aerial View Of Great Wall Of China 4K
#ScientificMethod #COVID19 #SocialDistancing How Does Science Correct Itself? The Scientific Method in Action](https://i.ytimg.com/vi/mmDconspb4A/mqdefault.jpg)

