All of that said, let's explore why Tums tablets are made from chalk and what benefit this provides to consumers. As Reader's ...

Together, they make the substance, calcium phosphate. Sidewalk chalk is made from calcium and sulfate, which makes calcium sulfate. One of the most common chemicals connected to calcium is called ...

As water moves through the chalk it will dissolve magnesium and calcium carbonate, which raises the electrical conductivity. It generally takes decades for the water to move through the chalk to the ...