Phosphotungstic acid (PTA) or tungstophosphoric acid (TPA), is a heteropoly acid with the chemical formula H3PW12O40]. It forms hydrates H3[PW12O40]·nH2O. It is normally isolated as the n = 24 hydrate but can be desiccated to the hexahydrate (n = 6). EPTA is the name of ethanolic phosphotungstic acid, its alcohol solution used in biology. It has the appearance of small, colorless-grayish or slightly yellow-green crystals, with melting point 89 °C (24 H2O hydrate). It is odorless and soluble in water (200 g/100 ml). It is not especially toxic, but is a mild acidic irritant. The compound is known by a variety of names and acronyms (see 'other names' section of infobox). In these names the "12" or "dodeca" reflects the fact that the anion contains 12 tungsten atoms. Some early workers who did not know the structure called it phospho-24-tungstic acid, formulating it as 3H2O·P2O5 24WO3·59H2O, (P2W24O80H6)·29H2O, which correctly identifies the atomic ratios of P, W and O. This formula was still quoted in papers as late as 1970. Phosphotungstic acid is used in histology as a component for staining of cell specimens, often together with haematoxylin as PTAH. It binds to fibrin, collagen, and fibres of connective tissues, and replaces the anions of dyes from these materials, selectively decoloring them. Phosphotungstic acid is electron dense, opaque for electrons. It is a common negative stain for viruses, nerves, polysaccharides, and other biological tissue materials for imaging by a transmission electron microscope. (Wikipedia).
Synthesis of (±)-Lysergic Acid
An organic chemistry minilecture on the 'Six-Step Synthesis of (±)-Lysergic Acid' by Brian J. Knight, Ryan C. Harbit, and Joel M. Smith*. It demonstrates a short, modular synthesis that can be used to synthesize analogues of LSD using a reductive dearomatization and an intramolecular Heck
From playlist Total Synthesis
Making Phenol by decarboxylation of salicylic acid
In this video we are making phenol by decarboxylating salicylic acid. If you liked the video you might also like some of the content I post on my othe social media platforms: Instagram: https://www.instagram.com/thyzoyd/?hl=de 🐦 Twitter: https://twitter.com/thyzoid1?lang=de 📌Reddit: http
From playlist Organic Chemistry
Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencuBNp_Ck
From playlist Chemistry
In today’s video we are making chloric acid from barium chlorate and sulfuric acid. Patreon: https://www.patreon.com/thyzoid Discord: https://discord.gg/UrjAt44HWH (Let me know if the discord link does not work) Instagram: https://www.instagram.com/thyzoyd/?hl=de 🐦 Twitter: https://twitt
From playlist Inorganic Chemistry
A quick definition of pH. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://www.paypal.me/so
From playlist Chemistry glossary
Acids and Bases - Short Revision || CBSE Science || || Infinity Learn Class 9&10
Acids and bases are two types of substances that are fundamental to chemistry. An acid is a substance that donates protons (hydrogen ions, H+) to a solution, while a base is a substance that accepts protons or donates hydroxide ions (OH-) to a solution. There are several ways to define and
From playlist Shorts
A quick definition of an acid. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://www.paypal.
From playlist Chemistry glossary
What Are Allotropes of Metalloids and Metals | Properties of Matter | Chemistry | FuseSchool
What Are Allotropes of Metalloids and Metals Learn the basics about allotropes of metalloids and metals, as a part of the overall properties of matter topic. An allotrope is basically a different form of the same element, each with distinct physical and chemical properties. For example
From playlist CHEMISTRY
Acids and Bases - Basic Introduction - Chemistry
This chemistry video tutorial provides a basic introduction into acids and bases. It explains how to identify acids and bases in addition to how they react with water. It discusses how to identify the conjugate acid and conjugate base of molecules. Finally, it covers the pH scale and pr
From playlist New AP & General Chemistry Video Playlist
General Chemistry 1C. Lecture 04. Acids and Bases. Pt. 1.
UCI Chem 1C General Chemistry (Spring 2013) Lec 04. General Chemistry -- Acids and Bases -- Part 1 View the complete course: http://ocw.uci.edu/courses/chem_1c_general_chemistry.html Instructor: Ramesh D. Arasasingham, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.
From playlist Chemistry 1C: General Chemistry
General Chemistry 1C. Lecture 05. Acids and Bases. Pt. 2.
UCI Chem 1C General Chemistry (Spring 2013) Lec 05. General Chemistry -- Acids and Bases -- Part 2 View the complete course: http://ocw.uci.edu/courses/chem_1c_general_chemistry.html Instructor: Ramesh D. Arasasingham, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.
From playlist Chemistry 1C: General Chemistry
Acids and Bases Review - General Chemistry
This chemistry video tutorial provides a basic introduction into acids and bases. It contains 60 multiple choice practice problems. It explains how to calculate the pH of strong acids, weak acids and bases, as well as buffer solutions. Access The Full 2 Hour 47 Minute Video on Patreon:
From playlist New AP & General Chemistry Video Playlist
Nitric Acid Concentration and Purification (Azeotropic and Fuming)
In this video we purify and concentrate dilute nitric acid using a combination of fractional distillation and drying agents to produce azeotropic nitric acid and fuming nitric acid. Donate to NurdRage! Through Patreon (preferred): https://www.patreon.com/NurdRage Through Youtube Membershi
From playlist Nitric Acid
22. Acid-Base Equilibrium: Salt Solutions and Buffers
MIT 5.111 Principles of Chemical Science, Fall 2014 View the complete course: https://ocw.mit.edu/5-111F14 Instructor: Catherine Drennan A buffer helps to maintain a constant pH. Our blood has a natural buffering system to ensure that the pH of our blood stays within a narrow window and t
From playlist MIT 5.111 Principles of Chemical Science, Fall 2014
Chem 51C. Lecture 7. Ch. 19. Carboxylic Acids and Nitriles
Full Chem 51C Playlist: https://www.youtube.com/playlist?list=PLqOZ6FD_RQ7lherMlgcDNCBHbQi5paAO_ Lecture 7. Ch. 19. Carboxylic Acids and Nitriles. Instructor: James S. Nowick, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://open.uci.edu/info (click on “terms of use”) More co
From playlist Chem 51C, Organic Chemistry (2022)
Acid Base Strength - Which Is Stronger?
This acids and bases chemistry video provides a basic introduction into acid strength and base strength. It explains how to determine which acid is stronger given the Ka and PKa values of the acid. It also explains how to determine which acid is stronger by considering factors such as si
From playlist New AP & General Chemistry Video Playlist
Acidic, Basic, and Neutral Salts - Ionic Compounds
This chemistry video explains how to determine if an ionic compound or a salt is acidic, basic, or neutral. Acidic ions include the ammonium ion and metal cations such as Al3+ and Fe3+. Basic ions include the conjugates of weak acids. Neutral ions include the alkali metal cations and co
From playlist New AP & General Chemistry Video Playlist
Oleum. Sulfur trioxide SO3. Chemical reactions
This video is about oleum. Also you will see pure sulfur trioxide (SO3) in the ampoule! Aaaaaaaaand... some CAESIUM footage here!
From playlist Oxidizers!
In this video, I decide which acids are the best! There are many properties to consider! (This video is a reupload). https://www.patreon.com/thatchemist Community Discord - https://discord.gg/QWNPETtPcZ
From playlist Chemistry Tierlists