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Gennadij [26K]
3 years ago
9

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -

20 oC?
Kf = 1.86 oC/m.
Chemistry
1 answer:
Pani-rosa [81]3 years ago
5 0
Colligative properties calculations are used for this type of problem. Calculations are as follows:<span>

</span><span>ΔT(freezing point)  = -(Kf)m
</span>-20.0<span>  = -1.86 °C kg / mol (m)
m = 10.75 mol/kg
</span><span>
10.75 mol C2H6O2 / kg water ( 1 L water ) ( 1 kg/L ) (62.07 g/mol )= 667.25 g

Hope this answers the question. Have a nice day.

</span>
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