Difference Between Complex and Double Salt

There are many things in life that have similar names and types but are completely different. Their uses, values ​​and scopes of use are also different. Therefore, it is necessary for everyone to clearly understand the pros and cons before using them, and to know which one is best for the body. So here I will introduce to you the difference between complexes and complex salts.

Applications of coordination compounds Applications of coordination compounds include:

In analytical chemistry, complexes can be used to:

In industrial production:

In biology, many biological molecules are complexes, and the combination of iron-containing hemoglobin with oxygen and carbon monoxide, the normal operation of many enzymes and magnesium-containing chlorophyll are also inseparable from the coordination mechanism. The commonly used cancer treatment drug cisplatin, namely cis-[PtCl2(NH3)2], can inhibit the DNA replication process of cancer cells and contains a planar square complex configuration. The mechanism of detoxification of heavy metals by antidotes such as ethylenediaminetetraacetic acid, sodium citrate, and 2,3-dimercaptosuccinic acid is that they can coordinate with heavy metal ions to convert them into coordination compounds with low toxicity, thereby achieving the purpose of detoxification.

For example, potassium aluminum sulfate [KAl(SO4)2] and potassium aluminum sulfate dodecahydrate [KAl(SO4)2·12H2O] are commonly known as alum. Alum is a colorless crystal that dissolves in water and completely ionizes to produce three ions. Al hydrolyzes to form Al(OH)3 colloid, and the aqueous solution is acidic.

Al(OH)3 has a strong adsorption capacity, it adsorbs impurities suspended in water to form precipitation. Therefore, alum can be used as a water purifier, as well as an astringent and mordant.

Potassium magnesium chloride [KMgCl3] is also a double salt. Natural KCl·MgCl2·6H2O, commonly known as carnallite, is easily soluble in water. KCl and MgCl2 can be extracted from carnallite. Both double salts and their hydrates are pure substances.

When a complex salt is dissolved in water, the ions it dissociates into are the same as those of the simple salts that make it up. Double salts can be prepared by crystallizing a mixed saturated solution of two simple salts. For example, by mixing and crystallizing solutions of CuSO4 and (NH4)2SO4, ammonium copper sulfate [(NH4)2SO4·CuSO4·6H2O] can be produced.

Item Tags: Chemical nouns Industrial hydrate mixture Physical chemistry Salts