Westonci.ca is the premier destination for reliable answers to your questions, brought to you by a community of experts. Get quick and reliable solutions to your questions from a community of experienced professionals on our platform. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

Which polyatomic ion is found in the compound represented by the formula NaHCO3?
(1) acetate (3) hydrogen sulfate

(2) hydrogen carbonate (4) oxalate

Sagot :

Answer is (2) - hydrogen carbonate


Explanation:


NaHCO₃ is an ionic compound which is made from Na⁺ and HCO₃⁻ ions. The decomposition is

NaHCO₃ → Na⁺ + HCO₃⁻


Among the resulted ions, Na⁺ is a monatomic ion while HCO₃⁻ is a polyatomic ion.


Polyatomic ions mean ions which are made of two or more different atoms.


HCO₃⁻ is made from 3 atoms as H, C and O. The name of HCO₃⁻ ion is bicarbonate or hydrogen carbonate.