The hydrogen carbonate ion is formed when an H+ ion combines with the polyatomic ion CO32-. What is the net charge on the hydrogen carbonate ion?

A. 2-
B. 1-
C. 1+
D. 2+

A

ok thinking nor A but B

B is right.

To determine the net charge on the hydrogen carbonate ion (HCO3-), we need to take into account the charges of the individual ions involved.

The hydrogen ion (H+) has a charge of +1, indicating that it has lost one electron.

The polyatomic ion carbonate (CO32-) has a charge of 2-, indicating that it has gained two electrons.

To combine these ions and form the hydrogen carbonate ion (HCO3-), the +1 charge from the hydrogen ion needs to balance out the -2 charge from the carbonate ion.

Since the carbon atom in the carbonate ion has a formal charge of +4, it attracts the negative charge due to its incomplete octet.

Therefore, we can say that the net charge on the hydrogen carbonate ion is 1- (option B) because the +1 charge from the hydrogen ion cancels out one of the -2 charges from the carbonate ion, leaving a single negative charge overall on the ion.