Quicklime 2

This time around it was 50g of chalk in and a couple hours on "high" in the kiln. 28g of lime came out. Since the ratio of molecular weights of calcium carbonate to calcium oxide is 100:56, that is dead on correct. Huzzah.

Day 14: in a clay pot with a loose lid, it appears to have reverted completely.

Quicklime 1

I gathered 60g of chalk (more or less pure, dry calcium carbonate)
I put it in the kiln (cone 05) for 8 hrs at top temp

Results

• The result weighed 34g
• That is almost exactly the 33.6g we expected
• The remainder may be unconverted chalk, absorbed water, or reabsorbed CO2