What's colour change of universal indicator on common salt and toothpaste solutions?
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❤ᴀ ᴜɴɪᴠᴇʀꜱᴀʟ ɪɴᴅɪᴄᴀᴛᴏʀ ᴡɪʟʟ ꜱʜᴏᴡ ᴀ ɢʀᴇᴇɴ ᴄᴏʟᴏᴜʀ ɪɴ ᴀ ꜱᴜɢᴀʀ ꜱᴏʟᴜᴛɪᴏɴ (ᴡʜɪᴄʜ ɪꜱ ᴛʜᴇ ᴄᴏʟᴏᴜʀ ꜰᴏʀ ᴘʜ 7). ᴀɴ ᴀQᴜᴇᴏᴜꜱ ꜱᴏʟᴜᴛɪᴏɴ ᴏꜰ ꜱᴜɢᴀʀ ɪꜱ ᴀʟꜱᴏ ᴀ ɴᴇᴜᴛʀᴀʟ ꜱᴜʙꜱᴛᴀɴᴄᴇ.
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