Mole ConceptHard
Question
In a textile mill, a double effect evaporator system concentrates weak liquor containing 4% (by mass) caustic soda to produce a lye containing 25% solids (by mass). What is the weight of water evaporated per 100 g feed in the evaporator?
Options
A.125.0 g
B.50.0 g
C.84.0 g
D.16.0 g
Solution
In 100 g of weak liquor, the mass of caustic soda present = 4 g. As on evaporation, only loss in mass of water will occur, the final mass of solid must be 4 g. If ‘x’ g water is evaporated, then
[EQUATION]
Create a free account to view solution
View Solution FreeMore Mole Concept Questions
A quantity of 5 g of a crystalline salt when rendered anhydrous lost 1.8 g of water. The formula mass of the anhydrous s...The absolute configuration of the two chiral centres in the following molecule are...At 373 K and 1 atm, if the density of liquid water is 1.0 g/ml and that of water vapour is 0.0006 g/ml, then the volume ...It was found from the chemical analysis of a gas that it has two hydrogen atoms for each carbon atom. At 0o C and 1 atm,...How many gram ions of SO4-2 are present in 1 gram molecule of K2SO4. Al2(SO4)3. 24H2O :...