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Topic: What Is This?  (Read 2522 times)

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Offline bast

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What Is This?
« on: April 22, 2015, 11:32:40 AM »
Anyone know what is the meaning of [H2O] (H2O in a square bracket symbol) in chemistry?
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Offline clarkstill

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Re: What Is This?
« Reply #1 on: April 22, 2015, 12:23:10 PM »
A square bracket often denotes the concentration of something, i.e. [X] is shorthand for the concentration of X. It depends on the context though...
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Offline bast

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Re: What Is This?
« Reply #2 on: April 23, 2015, 04:51:21 AM »
What is the formula of concentration?
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Offline Hunter2

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Re: What Is This?
« Reply #3 on: April 23, 2015, 06:33:01 AM »
Concentrations you can give in different units. At least its a amount divided to a volume. The amount can be a mass, moles, or also a volume.

c = b/V

So you can have b in g/l, mol/l , ml/l but also percentage.



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Offline bast

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Re: What Is This?
« Reply #4 on: April 23, 2015, 02:13:09 PM »
Does concentration is = molarity?
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Offline Hunter2

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Re: What Is This?
« Reply #5 on: April 23, 2015, 04:37:24 PM »
It is also a concentration unit.
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Offline Borek

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Re: What Is This?
« Reply #6 on: April 23, 2015, 04:49:49 PM »
Concentration is a measure of how much one substance is present in the mixture. Every way of expressing it that is unambiguous is OK. Molarity is one of these ways, but while molarity is a way of expressing concentration, saying that concentration is molarity is wrong.
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