Consider the resonance frameworks for the carbonate ion. Just how much negative charge is on each oxygen the the carbonate ion? What is the shortcut order of each carbon-oxygen link in the rbonate ion?

Carbonate ion acts together a base and also it can form three resonance structures. If a compound has an ext number of resonance structures then that is more stable.

You are watching: Consider the resonance structures for the carbonate ion

Negative fee on each oxygen atom deserve to be calculation by separating the charge existing oxygen atom with variety of oxygen atoms.

Calculate the shortcut order of every C-O shortcut by making use of the complying with expression.

Bondorder=TotalnumberofbondsNumberofC−Obonds\\rmBond\\,\\rmorder\\,\\rm = \\,\\frac\\rmTotal\\,\\rmnumber\\,\\rmof\\,\\rmbonds\\rmNumber\\,\\rmof\\,\\rmC - O\\,\\rmbondsBondorder=NumberofC−ObondsTotalnumberofbonds​

Part a

The resonance structures of lead carbonate ion are,


Here, 2 oxygen atoms have actually a fee of −1 - 1−1 and also other one is neutral.

So,thenegativechargeoneachoxygenatom=−2charge3=−0.67\\beginarrayc\\\\\\rmSo,\\,\\rmthe\\,\\rmnegative\\,\\rmcharge\\,\\rmon\\,\\rmeach\\,\\rmoxygen\\,\\rmatom\\,\\rm = \\,\\frac - \\rm2\\,\\rmcharge\\rm3\\\\\\\\ & & & & & \\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\,\\rm = \\, - \\rm0\\rm.67\\\\\\endarraySo,thenegativechargeoneachoxygenatom=3−2charge​​​​​​=−0.67​

Part b

The resonance structures of carbonate ion are,


Total variety of bonds existing in the carbonate ion is four.

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Number of C-O (i.e. Solitary bonds) bonds in lead carbonate ion is three.

Bondorder=TotalnumberofbondsNumberofC−Obonds=43=1.33\\beginarrayc\\\\\\rmBond\\,\\rmorder\\,\\rm = \\,\\frac\\rmTotal\\,\\rmnumber\\,\\rmof\\,\\rmbonds\\rmNumber\\,\\rmof\\,\\rmC - O\\,\\rmbonds\\\\\\\\\\,\\rm = \\,\\frac43\\\\\\\\ = \\,1.33\\\\\\endarrayBondorder=NumberofC−ObondsTotalnumberofbonds​=34​=1.33​

Ans: part a

Thus, the an adverse charge on each oxygen atom that the lead carbonate ion is −0.67 - \\rm0\\rm.67−0.67

Part b

Thus, the shortcut order at each carbon-oxygen shortcut in the carbonate ion is 1.331.331.33