fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-22 months ago[Partially incorrect, see comments.] Pens in Spacemander.xyzimagemessage-square152fedilinkarrow-up11.48Karrow-down135
arrow-up11.44Karrow-down1image[Partially incorrect, see comments.] Pens in Spacemander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-22 months agomessage-square152fedilink
minus-squareArcka@midwest.sociallinkfedilinkEnglisharrow-up5·1 month agoRegular chalk is calcium carbonate. Crayola’s website says their sidewalk chalk uses calcium sulfate (gypsum as an ingredient in plaster of paris). So they’re both calcium salts.
Regular chalk is calcium carbonate. Crayola’s website says their sidewalk chalk uses calcium sulfate (gypsum as an ingredient in plaster of paris).
So they’re both calcium salts.