A chapter may be made up of one scene, or of a number of scenes. Every scene should be thought of as a small movie with a beginning, middle and end. There should always be a mission or goal associated with each scene.
Other ways you can ensure your chapter is purposeful is to build on your character’s profile, build the understanding that the character has of the problem and complication, move the plot forward towards the resolution, add humour or experiences your readers can relate to, or explore the subject matter in greater depth.
If one or more of these elements is not present at all and you cannot see a way to add it in, you might like to remove the scene altogether. You can always save the piece of writing for another story.