Answer
Two K(+) ions and the CO$_3$(2-)
Work Step by Step
Upon dissociation, K$_2$CO$_3$ forms two K(+) ions, and the CO$_3$(2-) molecular ion.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.