What is the coordination number of platinum in the complex ion cis-diamminedichloroplatinum(ii)?

The coordination number of platinum is 4.

Explanation:

Coordination number is defined as the number of ligands that are attached to the central metal atom in a complex ion.

The complex given to us is: cis-diamminedichloroplatinum(ii)

The chemical formula for this complex is

In this complex, two ammine atoms are attached to platinum and two chlorine atoms are attached to platinum. This complex is also named as Cisplatin.

The structure of this complex is given in the image attached.

Hence, the coordination number of platinum is 4.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e