Q. 253.9( 62 Votes )

How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different?

Answer :

Atomic Mass of Oxygen = 16g

Atomic Mass of Carbon = 12g


Atomic Mass of Sodium = 23g


Molecular Mass of Sodium Carbonate = [23×2] + [12×1]+[16×3]


= 46 + 12 + 48


= 106g


1 mole of Na2CO3 = 106 g


0.5 mole of Na2CO3 = X g


X = [0.5×106]/1


= 53g of Na2CO3


0.5M of Na2CO3 signifies 0.5 moles of Na2CO3 dissolved in 1 litre of water or rather 53g of Na2CO3 dissolved in 1 litre of water.


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