Answer to Question #297555 in General Chemistry for shiela

Question

How many grams of BaCl₂ should be added to 300 g H₂O so that the freezing point of the solution is lowered – 8.3 ⁰C? Assume that the BaCl₂  completely dissociates in the solution.

Show Its Given, Required, Equation, Solution, Answer

Answer 1

∆T=iKbm.

m=∆T/iKb. = 8.3/3 x 1.86 = 1,4874552 mol/kg.

m=moles of solute/kg of solvent.

1,4874552 x 0.3 = 0,44623656.

0,44623656 x 208 = 92,8172045 g of BaCl2.