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Super Trick !!! Find the weight of water present in 1.61 g of Na2SO4.10H2O ?

Find the weight of water present in 1.61 g of Na2SO4 . 10H2O

ANSWER :

Moles of Na2SO4 . 10H2OMoles of water = 10 × moles of Na2SO4 . 10H2O= 10 × 0.05 = 0.05wt of water = 0.5 × 18 = 0.9 gm

 

Moles of Na2SO4.10H2O

Moles of water = 10 × moles of Na2SO4 . 10H2O

= 10 × 0.05

= 0.05 wt of water

= 0.5 × 18

= 0.9 gm 

 

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