we can absorb ink using a piece of chalk. how is it possible
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ᴄʜʀᴏᴍᴀᴛᴏɢʀᴀᴘʜʏ (ʟɪᴛᴇʀᴀʟʟʏ ᴛʀᴀɴsʟᴀᴛᴇᴅ ᴍᴇᴀɴs "ᴄᴏʟᴏʀ ᴡʀɪᴛɪɴɢ") ɪs ᴏɴᴇ ᴡᴀʏ ɪɴ ᴡʜɪᴄʜ ᴍɪxᴛᴜʀᴇs ᴄᴀɴ ʙᴇ sᴇᴘᴀʀᴀᴛᴇᴅ. ᴛʜᴇ ɪsᴏᴘʀᴏᴘʏʟ ᴀʟᴄᴏʜᴏʟ ᴡɪʟʟ ᴍᴏᴠᴇ ᴜᴘ ᴛʜᴇ ᴄʜᴀʟᴋ ʙʏ sᴜʀғᴀᴄᴇ ᴛᴇɴsɪᴏɴ, sɪᴍɪʟᴀʀ ᴛᴏ ʜᴏᴡ ᴡᴀᴛᴇʀ ɪs ᴀʙsᴏʀʙᴇᴅ ɪɴᴛᴏ ᴀ ɴᴀᴘᴋɪɴ. ᴀs ᴛʜᴇ ᴀʟᴄᴏʜᴏʟ ᴍᴏᴠᴇs ᴜᴘ ᴛʜᴇ ᴄʜᴀʟᴋ, ɪᴛ ᴘɪᴄᴋs ᴜᴘ ᴛʜᴇ ɪɴᴋ ᴘɪɢᴍᴇɴᴛ ᴀs ɪᴛ ᴛʀᴀᴠᴇʟs.
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Explanation:
Chromatography (literally translated means "color writing") is one way in which mixtures can be separated. The isopropyl alcohol will move up the chalk by surface tension, similar to how water is absorbed into a napkin. As the alcohol moves up the chalk, it picks up the ink pigment as it travels.
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