Name to Formula

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Name to Formula

Postby 005388369 » Thu Dec 05, 2019 10:28 am

If we had to write out the formula for tetraamminediaquacobalt(III) bromide, how are we supposed to know that it's Br3?

Myka G 1l
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Joined: Fri Aug 30, 2019 12:17 am

Re: Name to Formula

Postby Myka G 1l » Thu Dec 05, 2019 10:49 am

The formula for tetraamminediaquacobalt(iii) bromide is [Co(NH3)4(OH2)2] Br3 because the given charge of Cobalt is 3+ and the ammines and aquas are neutral so in order to balance the coordination compound the anion must have a charge of 3-. Bromine has a charge of 1- so there must be three of them to create a 3- charge and balance the compound.

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