aqua = (OH2) or (H20)

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Michele Shi 1K
Posts: 33
Joined: Thu Jul 27, 2017 3:00 am

aqua = (OH2) or (H20)

Postby Michele Shi 1K » Wed Nov 29, 2017 11:54 pm

When naming [Co(CN)5(OH2)], why is OH2 (aqua) written like that? (Aquapentacyanocobaltate(III))
There was another problem where you write the compound given the name "tetraamminediaquacobalt (III)bromide". The answer had aqua written like (H20)2..

Nehal Banik
Posts: 64
Joined: Thu Jul 13, 2017 3:00 am

Re: aqua = (OH2) or (H20)

Postby Nehal Banik » Thu Nov 30, 2017 12:02 am

This is because when you write out the chemical name, the Oxygen in water is supposed to be bonding to the central atom, and it is therefore meant to be written as (OH2), however since the ammonium is placed first when naming the compound, the ammonium attaches to the central atomic, but in most cases it is written as (OH2).

Lily Guo 1D
Posts: 64
Joined: Fri Sep 29, 2017 7:03 am

Re: aqua = (OH2) or (H20)

Postby Lily Guo 1D » Thu Nov 30, 2017 12:22 am

OH2 is written with the O first because the O is the atom with which bonds are formed.

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