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Say if the concentration of my diluted solution is 0.1920g/L, but it was diluted from 10mL to 250mL so in that case the dilution factor is 250/10 right? so i multiplied 0.1920g/L by 250/10 to get the concentration of my original undiluted solution and I got 4.8. Do I leave the units as it is? So 4.8g/L? If so, what is the reason for this?

Thanks


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1 Answer

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Best answer

Dilution factor is 25x yes, but you don't multiply by it, you divide by it. If you think logically about this, your concentration should be smaller if you're diluting it!

So it goes from 0.1920g/L to 0.00768g/L.

The units don't change, but another way to think about it is that previously you had 0.1920g/L, which is 0.001920g/10mL. Now you have 0.001920g/250mL, because you added more water. So it becomes 0.00768g/L (from dividing it by 250mL aka 0.250L)


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