Question

You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g
How many mols do you want? That's M x L = mols = ?
How many grams is that? That's g = mols x molar mass = ?

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