Chapter 7.3, Problem 27PP

Interpretation Introduction

Interpretation:

The formula for ionic compounds formed by ions from group 2 and polyatomic ions composed of carbon and oxygen..

Concept introduction:

Chemical compounds are formed when the atoms, ions or molecules of two substances are attracted towards each other forming a chemical bond. This bond can be electrostatic when two oppositely charged ions are attracted towards each other and this bond is said to be ionic bond.

Answer to Problem 27PP

The formula of ionic compound formed by ions from group 2 and polyatomic ions composed of carbon and oxygen is ${\text{ACO}}_3{}^{2-}$

Explanation of Solution

The periodic table depicts the position of group 2 elements.

The group 2 elements are also said to be alkaline earth metals. It has electronic configuration of ${\text{ns}}^{\text{2}}$. It has two valence electrons in its valence shell. The alkaline earth metals has tendency to lose two electrons and form +2 charged particles or divalent ions.

The polyatomic ion composed of carbon and oxygen carbon atom is carbon bonded to 3 oxygen atoms. Here carbon atom forms 1 double bond with one oxygen atom and two single bonds with two oxygen. Has overall charge of -2.

The polyatomic ion is ${\text{CO}}_3{}^{2-}$

The alkaline earth metal ion has +2 charge and carbonate ion has -2 charge. The ionic compound formed by combination of group 2, assumed to be ‘A’ and carbonate ion is ${\text{ACO}}_3{}^{2-}$.

Conclusion

The formula of ionic compound composedformed by ions from group 2 and polyatomic ions composed of carbon and oxygen is ${\text{ACO}}_3{}^{2-}$.