All High School Chemistry Resources
Example Question #1 : Help With Polyatomic Ions
Which of the following polyatomic ions has a net charge of ?
For this question, you need to have the charges of polyatomic ions memorized. This will tell you that of the answer choices only the carbonate ion has a net charge of .
Example Question #2 : Help With Polyatomic Ions
When the ionic compound is put in water, it dissociates to produce which of the following ions?
and are known as polyatomic ions. When a compound made up of polyatomic ions ionizes in water, it separates into the original polyatomic ions, not the individual elements.
Example Question #3 : Help With Polyatomic Ions
What is the correct molecular formula for phosphoric acid?
None of the answer choices are correct
Phosphoric acid combines a single phosphate ion with three hydrogen ions. The correct molecular formula is .