Question 3.27

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Robert Estrada
Posts: 50
Joined: Fri Sep 29, 2017 7:05 am

Question 3.27

Postby Robert Estrada » Thu Nov 02, 2017 2:08 pm

Can someone please explain #27 and how you find the chemical formulas?
a. thallium(III) oxide
b. manganese(II) chloride
c lithium nitride

Madelyn Gehrich 1E
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Re: Question 3.27

Postby Madelyn Gehrich 1E » Thu Nov 02, 2017 3:00 pm

a. Thallium (III) oxide. It indicates to you that in this compound, the thallium ion will be taking the 3+ form. Knowing that oxygen forms a 2- ion, you cross the charges to form the compound Tl2O3.
b. Manganese (II) chloride. It indicates to you that in this compound, the manganese ion will be taking the 2+ form. Knowing that the chlorine forms a 1- ion, you cross the charges to form the compound MnCl2.
c. Lithium nitride. Knowing that lithium forms a 1+ ion and nitrogen forms a 3- ion, you cross the charges to form the compound Li3N.

Isita Tripathi 2E
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Re: Question 3.27

Postby Isita Tripathi 2E » Fri Nov 03, 2017 5:35 pm

Just to clarify, the reason you cross the charges is because in order to obtain the chemical formula for the neutral compound, the charges have to cancel. So for c for example, it takes 3 Li + ions to cancel the 3- charge of one Nitrogen atom. The chemical formula is always the lowest amount of atoms that it takes to create the neutral compound, so make sure you reduce if needed.


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