What happens when you put a piece of chalk in vinegar?

Science experiment time. I know you are all curious. Keeping you awake at night, pondering what happens when a piece of chalk and vinegar meet.


We only had an old weathered piece of chalk but, we used it any way. We gently dropped it in. For a brief 10 seconds, it sizzled and bubbled, and then............

did absolutely nothing! Was it because the chalk had seen better days? Or maybe we should have used plain white piece? Or is it just a lame experiment? The questions wont haunt me, no not me!