Hello people,
today I present the preparation of calcium acetate from eggshells and vinegar.
The reaction is a simple acid-base between acetic acid and calcium carbonate, which eggshells are made of.
Procedure
100 g of eggshells are washed well with water and ground into tiny pieces. These are introduced into a large glass jar. To this, 1.5 l of 6% vinegar
is added. Suddenly, a vigorous reaction occurs, with strong gas production and foam, controlled by swirling and with a glass rod.
Once the effervescence is slowed down, another 0.5 l of vinegar is added. The jar is left standing at room temperature for two days with occasional
swirling. At the end, the reaction mixture is filtered through a cotton plug, the filtrate evaporates off to half volume on an open flame, and the
remaining is poured into a casserole and evaporated to dryness: an off-white jelly is obtained. The crude jelly is treated with 200 ml of acetone to
remove water and acid residual, filtered through a cotton plug; the residue is pressed on paper and left to dry in the open air.
109 g of white solid is obtained, corresponding to 61.87% yield, considering eggshells as pure calcium carbonate.
To watch the full procedure, I link you to my YT video
Thanks for attention, see you next time
palico |
