To say that humans evolved from chimpanzees is a common misconception of evolution caused by the confusion between Lamarckism and Darwinism.
Lamarck stated that evolution followed the chain of being and eventually the organisms would evolve into more "complex" beings. We know now that evolution doesn't work that way.
It would be more accurate to say that humans and chimpanzees come from a common ancestor because the species we can actually find are not transforming into others that also exist. If we map the species, they would be at the points of tree branches and the common ancestor between them would be in the nodes.