1. How many grams of ethylene glycol, C2H4(OH)2, are needed per kilogram of water to protect radiator...

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Chemistry

1. How many grams of ethyleneglycol, C2H4(OH)2, are needed per kilogram of water to protectradiator fluid against freezing down to -10Â°C?
2. For benzene, C6H6, the freezing point constant, Kf, is 5.12 KoC/m and its normal freezing point is 5.5Â°C. What is the freezingpoint of a solution containing 100.0 g of benzene and 20.0 g ofnaphthalene (C10H8)?
3. When 5.0 g of an unknown substance is dissolved in 100.0 g ofwater, the freezing point of the solution decreases by 1.5Â°C. Whatis the molar mass of the unknown substance if the compound does notdissociate to form ions in solution?
4. If 2.00 moles of a substance is dissolved in 1.00 kg ofwater, the freezing point of the solution decreases by 7.44Â°C. Doesthis substance dissociate to form ions in solution? Explainwhy.
5. Calculate the freezing point of a 0.2 m CaCl2 aqueoussolution, assuming it dissociates completely to form ions insolution.

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3.6 Ratings (549 Votes)

1 we know that depression in freezing point is given by dTf kf x m so 10 186 x m m 5376 now molality moles of solute mass of solvent kg so 5376 moles of EG 1 moles of EG 5376 now mass moles x See Answer

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