Question

Установите соответствие между составом комплексного соединения и классификацией 1) H[Cr(Н2О)2(CNS)4], 2) [Ni(Н2О)(NH3)5]Cl2, 3) K2[PbCl4] а) кислота; б) соль; в) основание

Answer 1

3) соль 1) кислота 2) основание

Answer 2

1) H[Cr(H2O)2(CNS)4]

This compound contains the chromium ion (Cr) coordinated with two water molecules (H2O) and four thiocyanate ions (CNS). The formula indicates that the compound is a complex ion with a positive charge of 1.

2) [Ni(H2O)(NH3)5]Cl2

This compound consists of a nickel ion (Ni) coordinated with one water molecule (H2O) and five ammonia molecules (NH3). The compound also contains two chloride ions (Cl). The formula suggests that the compound is a complex ion with a positive charge of 2.

3) K2[PbCl4]

This compound consists of two potassium ions (K) and one complex ion. The complex ion contains a lead ion (Pb) coordinated with four chloride ions (Cl). The formula indicates that the compound is a salt with a negative charge of 2.

Now let's match the composition of each complex compound with its classification:

1) H[Cr(H2O)2(CNS)4] - This compound contains a metal ion (chromium) coordinated with ligands (water and thiocyanate ions). The presence of ligands suggests that this compound is a complex ion.

2) [Ni(H2O)(NH3)5]Cl2 - This compound also contains a metal ion (nickel) coordinated with ligands (water and ammonia molecules). The presence of ligands indicates that this compound is also a complex ion.

3) K2[PbCl4] - This compound consists of a metal ion (lead) coordinated with ligands (chloride ions). However, the ligands are not explicitly mentioned in the formula. Nevertheless, the compound is still considered a salt because it contains a metal cation (Pb2+) and an anion (Cl-).

To summarize: 1) H[Cr(H2O)2(CNS)4] - Complex ion 2) [Ni(H2O)(NH3)5]Cl2 - Complex ion 3) K2[PbCl4] - Salt