fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-22 days ago[Partially incorrect, see comments.] Pens in Spacemander.xyzimagemessage-square149fedilinkarrow-up11.45Karrow-down135
arrow-up11.41Karrow-down1image[Partially incorrect, see comments.] Pens in Spacemander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-22 days agomessage-square149fedilink
minus-squareArcka@midwest.sociallinkfedilinkEnglisharrow-up5·1 day 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.
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Chalk isn’t chalk?
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.
no