They will "probably" work.  While the connector is the same and it should fit that way, non-enterprise drives (laptop/desktop consumer drives) can experience a wide range of problems - anywhere from simple comm errors in the controller log while the disks seem to be working ok, to not even being detected.  You could try and see, purchasing the drives later if necessary, but know you risk data loss if you do - if, being a lab setting, that isn't a big deal, then give it a shot.  But if you can't risk losing any data stored on the drives - or having it down while you figure out why drives are timing out and going offline randomly, then I'd get enterprise-class drives at a minimum.
Greetings, Recently obtained a PowerEdge 2950 Gen III, has 6 open bays for 2.5" drives.  I would never consider using laptop drives for production work, but this is a lab, and cost is a factor.  I have 2ea 36GB/15K server drives in it for boot, will laptop drives work for the other 6?   Thanks for any advice, I really appreciate it
Need advice on drives for a lab server