Follow us over to It’s OK To Be Smart to find out about the weird science behind the placebo effect:
This week Reactions is taking a look at the science and chemistry, or lack thereof, behind supplements. You’ve seen them in late night commercials and at your local pharmacy—little pills that claim to cure your cold, help you wake up or maybe help you lose weight. Vitamin and mineral supplements are everywhere and generate billions of dollars in revenue in the U.S. each year. But do they really work?
Find us on all these places:
Francisco Tomás-Barberán, Ph.D.
Darcy Gentleman, Ph.D.
Should you take multi-vitamins?
Large multivitamin studies showing no significant benefits for healthy people:
Some experts recommend multivitamins as “nutritional insurance”:
For those with diabetes, supplements can help:
Fish oil claims not supported by research:
Other sources: Trials for supplements don’t show adequate evidence of benefits
Hey guys in this video I’ll be showing you how to make a long-lasting smoke bomb combining KNO3+Sugar mixture. This experiment is very simple, all you need to do is this:
-Make cardboard container out of a toilet paper roll and spare carboard
-Mix KNO3 and sugar in the ratio of 6 to 4 (60% KNO3/40% Sugar)
-Stir on a low heat until it is liquid
-Pour into a cardboard container and put a fuse in it
-Wait to cool down and light it up
How To Make a Fuse: www.youtube.com/watch?v=U4lv_gxFGzc&t=1s
How To Make Hydrogen Generator At Home: www.youtube.com/watch?v=S48y5Z3daZE&t=2s
*KNO3 can be easily found in Lowes or Home Depot
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Smoke grenade can be very dangerous. Be careful. I’m not responsible for any injuries that can accrue.
I hope you will enjoy this video!
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Chill Guitar / Flamingo by jlsmrl
Creative Commons — Attribution 3.0 Unported — CC BY 3.0
Ever wonder whether your coffee is acidic or not? How about your tap water? We’re testing the pH of 10 Common Household Liquids using a digital pH meter.
Socratica sends a big thank you to Rozway for sending us their digital pH meter to use in this video!
You can buy your very own Rozway pH meter from Amazon and test everything in your house like we did! Here’s a link:
We would also like to thank our generous Patreon Sponsor, Tracy Karin Prell, for her kind donation that helped us make this video!! Tracy, you have been such a positive influence on us! We’re so glad you are on the Socratica Team!
Our first pH video is here:
Pure water is neutral, with a pH of 7, but most other water-based solutions are either acidic or basic. Some people are afraid of the word “acid,” thinking it means they are going to get burned. But the words “acid” and “base” merely tell you the direction a solution is moving away from neutral.
Acids increase the concentration of H+ ions in a solution.
Bases decrease the concentration of H+ ions in a solution.
If you’re concerned about safety, what you really want to know is the pH.
The pH scale runs from 0 to 14.
Acids have a pH less than 7.
Bases have a pH greater than 7.
The 10 Liquids we are testing today are:
Sriracha (hot sauce)
Now that you know the pH, can you calculate the H+ concentration? Post your answers in the comments!
We’d also like to hear if there are other common liquids you’d like us to test. If we get enough requests, we’ll make another video!
What to Watch Next:
Stoichiometry part 1
Stoichiometry part 2:
What is a Mole? Avogadro’s Number:
Unit Conversion 1:
Unit Conversion 2:
Our Periodic Table app is FREE in the Google Play store!
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We recommend the following books:
Brown and LeMay Chemistry: The Central Science
McGraw/Hill Chemistry by Chang & Goldsby
Uncle Tungsten: Memories of a Chemical Boyhood by Oliver Sacks
Napoleon’s Buttons: How 17 Molecules Changed History
Written and Produced by Kimberly Hatch Harrison
About our instructor:
Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time. Kimberly taught AP Biology and Chemistry at an exclusive prep school for eight years. She is now the head writer and producer of Socratica Studios.
Products in this video:
Rozway Digital pH Meter + x6 FREE pH Buffer Powder Pack | BONUS KIT | Pocket Size Accurate pH Scale 0-14 Water Quality Test Aquarium Pool Soil pH Test Kit No pH Strips Premium Hydroponic Supplies Kit –
Anti-science mentality is prevalent in modern society. This is evidenced most clearly in a complete distrust of chemicals synthesized in a laboratory. But does the activity of a molecule depend whatsoever on the pathway from which it formed? Let’s see why not.
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