Stručni rad

https://doi.org/10.15255/KUI.2019.025

Chemistry in Education:
How to Make Citric Acid and Sugar Crystals

Milan Sikirica ; Zavod za opću i anorgansku kemiju, Kemijski odsjek, Prirodoslovno-matematički fakultet, Horvatovac 102A, HR-10 000 Zagreb

Sažetak

Middle school students almost regularly perform experiments of crystallization of copper(II) sulphate pentahydrate and kitchen salt. Copper(II) sulphate pentahydrate is poisonous and harmful to the environment, and larger crystals of kitchen salt are difficult to obtain. Instead of experimenting with the crystallization of copper(II) sulphate pentahydrate and kitchen salt, it is better to carry out crystallization of citric acid and common (table) sugar. These materials are inexpensive, easily accessible, biodegradable, and not environmentally hazardous.




This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi

chemical education; citric acid; sugar; experiment; crystal; crystallization; crystal lattice; crystal structure; unit cell; symmetry

Hrčak ID:

228063

URI

https://hrcak.srce.hr/228063

Datum izdavanja:

7.12.2019.

Podaci na drugim jezicima: hrvatski

Posjeta: 8.047 *