Suggest an explanation and method of improvement when a reaction have negative yield i.e. the mass of container with product is less than the mass of empty container

Question

Suggest an explanation and method of improvement when a reaction have negative yield i.e. the mass of  container with product is less than the mass of empty container

caozeyuan · Answer

@Photon336

photon336 · Answer

So the Mass of container with product less than the mass of container

aaronq · Answer

Is this some sort of riddle? It's not possible for the container to weigh less after a chemical reaction, unless it's being degraded in the process.

caozeyuan · Answer

@aaronq It sounds super ridiculous but it did happen to me when I was doing orgo labs

photon336 · Answer

Could it be possible that you didn't tare your compound/flask  properly?

aaronq · Answer

I agree with Photon, you probably didn't tare your flask properly.