What builds up inside kettles due to a chemical reaction?
Correct answer: Limescale

Goblin
yeah... but does it add calcium to your diet?

Goodtime
Sorry, but I don't think the precipitation of CaCO3 from a saturated sol'n is a chemical reaction. It's a physical reaction

Dee1
my sisters Ann and Maeve lived in different parts of Navan MEATH Irelands One limescale one not .same town amazing

SkyEagle
In Africa they don't have such horrible stuff in the water.