Answer
This sample is basic.
Work Step by Step
At $25^{\circ} C$, solutions with pH < 7 are considered acidic, with pH = 7 are neutral, and with pH > 7 are basic.
Since 7.90 is greater than 7, this solution is basic.
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.