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amount of substance

a sample of 2.0 moldm^-3 acid has a volume of 100cm^3
what volume of water in cm3 should be added to this acid to dilute the sample to a concentration of 1.5 moldm^-3
Work out the moles in the original acid, then find the total volume for that many moles to be of a concentration of 1.5M
Original post by Hena.mehay
Wouldn’t it be 50cm3 of water to add?

Nop, that's not what I got
Original post by *****deadness
Nop, that's not what I got


Have you used m1v1 = m2v2? I didn’t use that but I just saw it online
Original post by Hena.mehay
Have you used m1v1 = m2v2? I didn’t use that but I just saw it online

I didn't do it that way but I using that equation just now I get the same answer as I did, and it's not 50cm3
Original post by *****deadness
Nop, that's not what I got


Did you get 133.333 —> 133.34 cm3 ?
Original post by Hena.mehay
Did you get 133.333 —> 133.34 cm3 ?

Yeah sounds about right

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