

Stoichiometry - Engineering
Q1: 80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution isA 0.00
B 0.18
C 0.24
D 1.00
ANS:B - 0.18 To solve this problem, we need to determine the weight fraction of Na2SO4 in the remaining solution after 80 kg of Na2SO4·10H2O crystals separate out. Let's first find the initial weight fraction of Na2SO4 in the solution before any crystallization occurs:
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