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Calculating Concentration

There are 0.00118mol of iodine in 25cm3 of solution
The molecular mass of iodine is 254

1) Calculate the concentration of iodine in mol dm-3

2) Clalculate the concentration of iodine in g dm-3
Reply 1
Avatar for pinkpink
pinkpink
3
concentration = mole/volume therefore 0.00118/25x10^-3 (got to be in metres cubed)
therefore conc is 0.0472moldm^-3
Reply 2
Avatar for pinkpink
pinkpink
3
2) mass = Mr x moles
mass = 254 x 0.00118 = 0.29972g
conc = mass/volume therefore 0.29971/25x10^-3
conc = 11/9888 g dm-3
Reply 3
Avatar for pinkpink
pinkpink
3
sorry answr for 2) is 11.9888 g dm-3

i made a typo
Reply 4
Avatar for Carlo08
Carlo08
Or for conc just use Cv/1000

So for conc it would be Moles * 1000 / V

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