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Ethylene glycol is used as antifreeze to reduce freezing point of water to -2.4^ C . What mass of antifreeze is required for 2 ~L water? (K_f . water .=1.86 ~K ~kg / mole )

Options

  1. A16 ~kg
  2. B160 ~g
  3. C1.60 ~kg
  4. D16 ~g

Correct answer

B. 160 ~g

Step-by-step solution

aligned w_ solute & = T_f w_ water M_ solute K_f & = 2.4 2 0.062 1.86 =160 ~g aligned [Mass of 2 ~L of water is 2 ~kg .]

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