Question

Which of the following solute amounts, when dissolved in 1.00 kg of water, would produce a solution with a freezing point of -1.86 ^oC?

Group of answer choices

2.00 moles of sugar

0.50 moles of KBr

2.00 moles of NaI

1.00 mole of NaCl

Answer 1

kg = 1.86 "Cim Aty = ix kq X Holality ① sugar = 7.44°C oTf = 1 X 1.86 X "Im 2.0 mol I kg @ KBr 0.50 mol = 1.86€ a Tf = ax 1.868 acum leg 6 NaI ATS = 2 x 1.86 cm x 2.0 mol = 7.44°C = 3.72°C a att = ax 1.86°C1m x 1.0 mol Ikg -1.86°C 3 KBr produces a solution of freezing point -