Writing Formulas from Names (2 of 2)

[@marisellareadon3607]

This is awesome! I'm having a little difficulty understanding this in class, but now I completely understand it. Thank you so much for your videos!

[@FruitCakexDD]

you just taught me how to do this better than my teacher did :D thankyou for being my exam revision! :)

[@chemhelps]

Actually, it is not an error to not use parentheses. The reason is that there are not 3 CO ions, but 1 CO3 ion (not showing charges). Remember, carbonate is CO3(2-), so the 3 refers to the number of oxygen atoms in the carbonate ion, not the number of ions bound to the 2 Li ions, as you have incorrectly expressed (there is no such thing as a CO ion, nor could you balance the 2+ charge of the 2 Li+ ions with 3 of them). Since there is only 1 Carbonate ion used, we need not use parentheses at all.

[@loganhansen6506]

Thank you

[@arsenal5368]

Sulfur trioxide is wrong. Sulfur has a charge of 2-

[@chemhelps]

Before you make such a definitive statement, it would be well to think about it a bit more thoroughly. Sulfur has a 2- charge when it is in an ionic compound. However, Sulfur Trioxide is not an ionic compound. The 2- of Sulfur cannot form an ionic bond with oxygen, which also has a 2- charge. Two nonmetals bond together only by sharing electrons, forming a molecular compound, not ionic. Therefore, we do not speak of their charges. Molecular compounds have a different naming scheme: using the Greek prefixes, yielding the name I gave it.

[@TheKatrinalovett]

you is so right fruitcake he is awesome