fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-210 days ago[Partially incorrect, see comments.] Pens in Spacemander.xyzimagemessage-square140linkfedilinkarrow-up11.47Karrow-down134
arrow-up11.43Karrow-down1image[Partially incorrect, see comments.] Pens in Spacemander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-210 days agomessage-square140linkfedilink
minus-squareArcka@midwest.sociallinkfedilinkEnglisharrow-up5·9 days 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