what is the amount of oxalic acid 3g to prepaid m/20 solution in 500ml
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Molecular weight of oxalic acid = 90g/mole
n/20 = 0.05 moles/litre
= 90 * 0.05 g/litre
= 4.5 g/litre
So weigh out 4.5 g and dissolve in a litre of water
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