[zerokun]

In an experiment,
20 microLitre of 20 mili Mol / Litre of phenylphosphate was used.
What is the  concentration of phenylphosphate?

I try to calculate by first converting 20 microLitre to 2.0 X 10 ^-3   L
and then, i divide by 20 X 10^-6 L because i use  20  microlitre of phenylphosphate.
So i got 1000 mol L^-1

which is wrong, the correct answer is 0.02

does anyone comes out with any idea in how to calculate this I really need your help.Thxxxx in advance

[cliverlong]

In an experiment,
20 microLitre of 20 mili Mol / Litre of phenylphosphate was used.
What is the  concentration of phenylphosphate?

I try to calculate by first converting 20 microLitre to 2.0 X 10 ^-3   L

That is wrong

micro = 10^-6

and then, i divide by 20 X 10^-6 L because i use  20  microlitre of phenylphosphate.
So i got 1000 mol L^-1

which is wrong, the correct answer is 0.02

But I don't understand why you use / are given the volume data - it is irrelevant in this context

You wrote above

20 mili Mol / Litre of phenylphosphate

This is already a concentration (amount in moles / volume)

So converting to

20 x 10^-3 mol litre^-1

This gives a concentration of 0.02 mol litre^-1 (note the units) - which is the answer you are trying to understand

does anyone comes out with any idea in how to calculate this I really need your help.Thxxxx in advance

Does what I have written make sense to you?

Clive

[zerokun]

Yes, it make sense

The volume is given because there is another question which require too calculate using the formula C₁V₁=C₂V₂
I get confuse with the unit but i manage to solve it during lab today

Thxxxx anyway ! ! ! !