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| Name | TARTARIC ACID PREPARATION |
| Video Uploader | Video From PubliosValesios |
| Upload Date | This Video Uploaded At 05-06-2011 14:50:33 |
| Video Discription | Hi guys. I'm back today with a procedure able to make you get relatively pure tartaric acid from potassium bitartrate sold in groceries. Depending on where you live it will be cheaper buying direclty tartaric acid than doing it, but this video as you know is meant just to explore the science. Warning, tartaric is irritating and sulfuric acid is highly corrosive. Wear gloves and a proper lab equipment during the experiment. Let's get started. Add 37,5 grams of potassium bitrartrate to 250 ml of hot water and try to solve as much as you can (potassium bitartrate is non so soluble). While keeping the temperature high but under 100 degrees celsius, add carefully 15 grams of calcium carbonate in powder. Bitartrate becomes calcium tartrate and neutral potassium tartrate. There is also a release of CO2. This is the reaction: CaCO3+ C4H5KO6------ C4H4CaO6 + C4H4K2O6 + CO2 + H2O Then we add 15 grams of calcium chloride solved into hot water. The neutral potassium tartrate is changed into calcium tartrate thanks to a double echange reaction: CaCl2 + C4H4K2O6----- 2 CH4CaO6 + 2KCl By philtration you collect the calcium tartrate insoluble into water. Then you will put it into a beaker that you will put in a pan with boiling water, and you won't put the beaker directly on the hotplate. Sothat add 25 ml of 96% H2SO4 solved in 75 ml of water. After thirty minutes calcium tartrate is decomposed into pure tartaric acid and on the bottom calcium sulfate settles. This is the reaction: H2SO4 + C4H4CaO6-----CaSO4 + C4H6O6. Filtrate while is still hot. Wash many times the sulfate that contains still quantities of tartaric acid and add the washing water to the philtrate. Let it evaporates for 6-10 days, than you will collect large crystals of tartaric acid. Tartaric acid is an useful reagent to make tartrates. Thanks for watching |
| Category | Science & Technology |
| Tags | TARTARIC | ACID | PREPARATION |
