fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-222 天前[Partially incorrect, see comments.] Pens in Spacemander.xyzimagemessage-square152fedilinkarrow-up11.47Karrow-down135
arrow-up11.44Karrow-down1image[Partially incorrect, see comments.] Pens in Spacemander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · edit-222 天前message-square152fedilink
minus-squareArcka@midwest.sociallinkfedilinkEnglisharrow-up5·22 天前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.
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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