Answer
Please see the work below.
Work Step by Step
We know that $Na^{+}$ has a larger energy of hydration as the ionic radius is smaller than $K^{+}$, so it will give a more concentrated electric field as compared to $K^{+}$
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.