Harding made 10 of 16 shots and was 4 of 8 from 3-point distance, Chapman was 8 of 14 from the floor as the Wildcats shot 55 percent to Idaho State's 33 percent.
Weber State (11-6) remained tied with Northern Colorado atop the Big Sky Conference standings at 5-1. The teams meet Saturday in Ogden.
The Bengals built a 25-18 lead early, but Weber State closed out the first half on a 21-4 run to lead by 10 at the half, then scored the first five points of the second half on a Harding 3 and a Chapman jumper.
White says Nembhard is pretty unique
There are high expectations for guard Andrew Nembhard this season as he exhibits great leadership as a sophomore.
Gators have to get better in order to max out as a team
Florida head coach Mike White and guard Andrew Nembhard join the SEC Now desk to discuss Nembhard's growing leadership.
Pearl: We came to make history
Auburn head coach Bruce Pearl joins the SEC Now team to discuss how Auburn's established academic and athletic success made the Final Four run possible.