Potassium sodium tartrate tetrahydrate, also known as Rochelle salt, is a double salt of tartaric acid first prepared (in about 1675) by an apothecary, , of La Rochelle, France. Potassium sodium tartrate and monopotassium phosphate were the first materials discovered to exhibit piezoelectricity. This property led to its extensive use in "crystal" gramophone (phono) pick-ups, microphones and earpieces during the post-World War II consumer electronics boom of the mid-20th century. Such transducers had an exceptionally high output with typical pick-up cartridge outputs as much as 2 volts or more. Rochelle salt is deliquescent so any transducers based on the material deteriorated if stored in damp conditions. It has been used medicinally as a laxative. It has also been used in the process of silvering mirrors. It is an ingredient of Fehling's solution (reagent for reducing sugars). It is used in electroplating, in electronics and piezoelectricity, and as a in cigarette paper (similar to an oxidizer in pyrotechnics). In organic synthesis, it is used in aqueous workups to break up emulsions, particularly for reactions in which an aluminium-based hydride reagent was used. Sodium Potassium tartrate is also important in the food industry. It is a common precipitant in protein crystallography and is also an ingredient in the Biuret reagent which is used to measure protein concentration. This ingredient maintains cupric ions in solution at an alkaline pH. (Wikipedia).
Chemistry - Acids & Bases Fundamentals (16 of 35) Acid-Base Titration Basics: Ex 1
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the M(HCl)=? of an acid-base titration when 27ml of 0.44M KOH is added to 36ml of HCl.
From playlist CHEMISTRY 22 ACIDS AND BASES
How to make Hot Ice at home - Amazing Science Experiment
Amazing Science Experiments with Home Science In this video you will see how to make hot ice at home. Sodium acetate or hot ice is an amazing chemical you can prepare yourself from baking soda and vinegar. You can cool a solution of sodium acetate below its melting point and then cause th
From playlist Home Science Videos - Cool Science Experiments
Underwater Potassium - Periodic Table of Videos
Breaking two ampoules of Potassium underwater. See our previous sodium video: https://youtu.be/IaP3lGfa2n0 Caesium next: https://youtu.be/b2YrZNahqiw Alkali Metal playlist: http://bit.ly/Alkali_Metals Music: Alan Stewart Choose your element - Periodic Videos on Patreon: https://www.patre
From playlist Alkali Metals - Periodic Videos
In this video I make hydrobromic acid from sulfuric acid and sodium bromide. You can also use potassium bromide.
From playlist Syntheses and Demonstrations
Copper - Periodic Table of Videos
Here's a new video about copper, including a nice demonstration and some stories from The Professor. (We kept one older story from the original video because it was too interesting) More chemistry videos at http://www.periodicvideos.com/ Follow us on Twitter at http://twitter.com/
From playlist With Portuguese subtitles (Português) - Periodic Videos
Organic Chemistry 51B. Lecture 15. Reduction and Oxidation, Part 3.
UCI Chem 51B Organic Chemistry (Winter 2013) Lec 15. Organic Chemistry -- Reduction and Oxidation -- Part 3 View the complete course: http://ocw.uci.edu/courses/chem_51b_organic_chemistry.html Instructor: David Van Vranken, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw
From playlist Chemistry 51B: Organic Chemistry
How to Make Potassium Nitrate at Home
How to make potassium nitrate at home with instant cold packs and "sodium-free" salt. "Sodium-free" salt is actually potassium chloride. Instant cold packs contain ammonium nitrate and if the two are mixed potassium nitrate and ammonium chloride are formed in equilibrium. Fortunately po
From playlist Fire & Pyro
Make Nitric Acid from Sodium Bisulfate and Sodium Nitrate
In this video we Make Nitric Acid from Sodium Bisulfate and Sodium Nitrate. I actually try a few methods like dissolving them in water first and varying the amount of reagents. Overall the best method i found was to thoroughly mix 43g of sodium nitrate with 150g of sodium bisulfate and t
From playlist Nitric Acid
Recreating the world's first test for diabetes
Support my channel by getting a free trial today, at http://www.squarespace.com/nilered. You'll also get 10% off your first purchase. ------------------------------------------ This video is a special one and I made it specifically for World Diabetes Day, which happens every year on Nove
From playlist Interesting Explanations
I react sodium metal with potassium chloride at high temperatures to obtain potassium metal. NightHawk's Video: https://www.youtube.com/watch?v=RJ21jQiOv2E Help me make videos by donating here: https://www.patreon.com/CodysLab
From playlist Reactive metals
How to make Rochelle salt piezoelectric crystals
Step-by-step video on how to make Rochelle salt crystals or piezoelectric crystals for doing piezoelectricity experiments or hacks for science fairs or fun. Includes details on the ingredients: baking soda (sodium bicarbonate), cream of tartar (potassium bitartrate) and distilled water. W
From playlist Piezoelectricity
Why Baking Powder is NOT The Same as Baking Soda
When baking, cooking, or doing science experiments, it is essential to remember that baking powder is NOT the same thing as baking soda. So why do they both exist? What makes them different, and what can go wrong if you mix them up? Join Hank Green for a new episode of SciShow! Learn mor
From playlist Uploads
IB Chemistry lesson on Carbohydrates from Biochemistry special topic
From playlist IB Chemistry
21. Berzelius to Liebig and Wöhler (1805-1832)
Freshman Organic Chemistry (CHEM 125) The most prominent chemist in the generation following Lavoisier was Berzelius in Sweden. Together with Gay-Lussac in Paris and Davy in London, he discovered new elements, and improved atomic weights and combustion analysis for organic compounds. Inve
From playlist Freshman Organic Chemistry with J. Michael McBride
Making Tributyltin hydride: A Unique Hydrogen Donor
The first 1,000 people to use the link will get a 1 month free trial of Skillshare: https://skl.sh/chemiolis11221 Support my channel with patreon: https://www.patreon.com/chemiolis In this video I am preparing Tributyltin hydride from tin metal, which is a unique and useful hydrogen d
From playlist Interesting Applications
Chemistry 51B: Organic Chemistry. Lecture 17
UCI Chem 51B: Organic Chemistry (Winter 2015) Lec 17. Organic Chemistry -- Green Chemistry View the complete course: http://ocw.uci.edu/courses/chem_51b_organic_chemistry.html Instructor: Susan King, Ph.D. License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/info More cours
From playlist Chemistry 51B: Organic Chemistry
How to make Calcium Hydroxide (Ca(OH)2)
Note: It is much cheaper to just buy CaOH2. This video is more for informational purposes if you don't want to buy it. It is extremely cheap stuff to buy. ------------------------------------------- In this video we will make calcium hydroxide. I am producing this to use in a future vid
From playlist Syntheses and Demonstrations
Everything Matters | Sodium | Ron Hipschman | Exploratorium
Essential, explosive sodium is a soft, silvery alkali metal that roils in water, releasing clouds of hydrogen gas that fan its yellow flames. It reacts with most elements, and is naturally found only in compounds, such as common salt.
From playlist Tales from the Periodic Table
25. Models in 3D Space (1869-1877); Optical Isomers
Freshman Organic Chemistry (CHEM 125) Despite cautions from their conservative elders, young chemists like Paternó and van't Hoff began interpreting molecular graphs in terms of the arrangement of a molecule's atoms in 3-dimensional space. Benzene was one such case, but still more signifi
From playlist Freshman Organic Chemistry with J. Michael McBride