Chemistry, asked by ayush2706, 1 year ago

26.8g Na2SO4.nH2O has 12.6g water. Find the value of n

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Answered by chaipanch98
11
molar weight of Na2SO4=23*2+32+16*4=46+32+64=142

moles of water=12.6/18=0.6
wt of Na2SO4 in salt =26.8-12.6=14.2
moles of Na2SO4=0.1

since 0.1 moles Na2SO4 contain 0.6 moles water.
1 mole Na2SO4 contain 6 moles of water.
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