Question

What is


shape of po33-

Answer 1

shape is trigonal pyramidal.............

Answer 2

The shape of $po_3-_3$ is trigonal pyramidal .

Explanation:

• The given ion is an Phosphite ion  with a formula $po_3-_3$.

• To find out the shape we need to calculate the valence electrons in this. Valence electrons are the electrons which are present in the outermost orbital of atom.

• Phosphorus belongs to group 15 hence it’s Electronic configuration is 2,8,5 .So, the valence Electron in P is 5 .

• The electronic configuration of Oxygen having atomic number 8 is 2,6.

• So oxygen has 6 valence electrons in its atom but there are total 3 atoms of Oxygen in phosphite ion .  

• So, the total no. of valence electrons contributed by the oxygen is 18 .

• Now the valence of  phosphorus and oxygen is added which gives 23 plus 3 as there is negative charge of 3 on the ion .Hence total valence electrons are 26 .

• Now on arranging these electrons depending upon their requirements to complete the octet.

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