Question

4. What idea did Dr Sheffield and his team come up with to fill the
toothpaste into tubes?​

Answer 1

• The most commonly used abrasives are hydrated silica (softened silica), calcium carbonate (also known as chalk), and sodium bicarbonate (baking soda). Other abrasives include dibasic calcium phosphate, calcium sulfate, tricalcium phosphate, and sodium metaphosphate hydrated alumina.

Answer 2

Explanation:

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• ᴛʜᴇ ᴍᴏsᴛ ᴄᴏᴍᴍᴏɴʟʏ ᴜsᴇᴅ ᴀʙʀᴀsɪᴠᴇ ᴀʀᴇ ʜʏᴅʀᴀᴛᴇᴅ sɪʟɪᴄᴀ (sᴏғᴛᴇɴᴇᴅ sɪʟɪᴄᴀ) ,ᴄᴀʟᴄɪᴜᴍ ᴄᴀʀʙᴏɴᴀᴛᴇ (ᴀʟsᴏ ᴋɴᴏᴡɴ ᴀs ᴄʜᴀʟᴋ).

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ᴍᴀʀᴋ ᴍᴇ ᴀs ʙʀᴀɪɴʟɪsᴛ