22-05-2018
Chemistry

contestada

What mass of Na2SO4 is needed to make 2.5L of 2.0 M solution?

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RinaLimbu RinaLimbu

22-05-2018

Moles of Na2SO4 = conc. x volume(dm3)
= 2 x (2500cm3/1000)
= 5 mol

Mass of Na2SO4 = moles x molar mass
= 5 x ((23 x 2) + 32.1 + (16 x 4))
= 710.5g

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