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Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

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Two chemistry egg tricks

The French have a saying: "You cannot cook an omelet without breaking eggs."Chemists hearing this proverb totally disagree. There is nothing easier than cleaning an egg without breaking its shell.
Probably our readers have already guessed how to do this, as it’s known that the hard shell of the egg is carbon dioxide, like chalk and marble.

Supersaturated Solution

A solution that contains a higher than saturation concentration of solute, slight disturbance or seeding causes crystallization of excess solute.

Calorimeter

A device used to measure the heat transfer between system and surroundings.

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Coordination Isomers

Isomers involving exchanges of ligands between complex cation and complex anion of the same compound.

Chemistry is a familiar school subject

Everyone liked to observe the reaction of reagents. But few know interesting facts about chemistry, which we will discuss in this article.

Ioniztion

The breaking up of a compound into separate ions.

Hard Water

Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.