Polysulfides are a class of chemical compounds containing chains of sulfur atoms. There are two main classes of polysulfides: inorganic and organic. Among the inorganic polysulfides, there are ones which contain anions, which have the general formula S2−n. These anions are the conjugate bases of the hydrogen polysulfides H2Sn. Organic polysulfides generally have the formulae R1SnR2, where R = alkyl or aryl. (Wikipedia).
What is polycarbonate and what is it used for?
From wiki: Polycarbonates are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Wikipedia L
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
The liquid that pours itself - Polyethylene Oxide
Also called POLYOX, this liquid is viscoelastic do it is very long polymer chains meaning it behaves in strange ways. Visit my blog here: http://stevemould.com Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here: http://mathsgear.co.uk
From playlist Best of
What is Polypropylene and what is it used for?
From wiki: Polypropylene, also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. W
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
Making Hydrogen Sulfide From Common Household Materials | LabCoatz Shorts
In my mad attempt to synthesize thioacetone, I stumbled upon a problem: I would need to make hydrogen sulfide. Unfortunately, at the time of this video, I didn't have any iron or aluminum powder to make the corresponding metal sulfides with (which are frequently used to make H2S), and the
From playlist LabCoatz Shorts
In this video, I will be extracting and refining mercury metal from mercury sulfide (cinnabar). This is a chemical method, which is safer than the typical heated one. It is a follow-up to this video: https://youtu.be/S4T57SFntIs This process was developed by Plante1999 from the Sciencem
From playlist Mercury
Why This Accidental Battery Breakthrough Matters
Exploring why an accidental discovery may have unlocked the holy grail in battery research: an energy dense, long lasting, and safe battery. Visit https://brilliant.org/undecided to sign up for free. And also, the first 200 people will get 20% off their annual premium membership. Lithium s
From playlist Battery technology
Everything Matters | Sulfur | Dr. Elton Cairns | Exploratorium
Today's lithium ion batteries aren’t able to meet the power and energy requirements for portable electronics and electric vehicles—nor are they meeting safety and cost requirements well. Lithium/ sulfur batteries could potentially triple the energy storage capability of lithium ion cells,
From playlist Tales from the Periodic Table
Making sodium polysulfide (short clip)
From playlist Inorganic Chemistry
What are four types of polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Toning Silver Coins by Anodization (fixed)
In this video we show how to use Anodization to give colors to silver coins, also known as toning. First we mix 200mL of water, 10g of powdered sulfur and 20g of sodium hydroxide and stir for ten minutes or so. This forms a solution of sodium polysulfides. Then we place in the solution o
From playlist Electrochemistry
Teach Astronomy - Atmosphere of Saturn
http://www.teachastronomy.com/ Saturn has similar atmospheric composition and structure to Jupiter. As on Jupiter, scientists refer to different regions and morphologies in the atmosphere. There are the bright zones, white or yellowish in coloration, and the darker belts which are grayer
From playlist 09. Outer Planets and Planetary Atmospheres
What are the names of different types of polygons based on the number of sides
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Polymorphs can be a headache for people who make pharmaceuticals. Find out why? More chemistry at http://www.periodicvideos.com/
From playlist Chem Definition - Periodic Videos
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
This is my shortest video so far and nothing goes wrong. Well, we do only end up with a 52% yield but still, nothing goes wrong
From playlist Ortho-DDNP
What is the Battery of the Future?
There are many other battery types beyond lithium ion, and they may harbor capabilities like unprecedented charging speeds, high power capacity, and temperature stability. But each new design comes its own limitations. So, realistically, what could futuristic batteries look like? Full play
From playlist Introducing Light Speed: Powered by the Sun
What is Polystyrene (styrofoam) and what is it used for?
from wiki: Polystyrene is a synthetic aromatic hydrocarbon polymer made from the monomer known as styrene. Polystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight. Formula: (C8H8)n IUPAC ID: poly(1-phen
From playlist Materials Sciences 101 - Introduction to Materials Science & Engineering 2020
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is a polygon and what is a non example of a one
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
No glassware was harmed in the making of this video- surprisingly. I smell awful though. The way the hydrogen sulfide smell clings to your skin and hair... dreadful stuff.
From playlist Ortho-DDNP